Introduction
A manufacturing company that enters production in China on the basis of a licenced product design — or a design its own engineers have created and cleared against product patents — is operating under a common but incomplete assumption: that clearing the product is the same as clearing the production process. It is not. Process patents and product patents are distinct IP categories. A process patent covers how something is made, not what is made. A product that does not infringe any product patent may still be manufactured using a process that infringes a process patent held by a domestic competitor.Â
This distinction is commercially material for manufacturing companies entering or expanding in the Chinese market. Chinese manufacturing companies have been systematic in building process patent positions around the key production methods in their industries. These positions are held alongside product patents and utility models but cover a different dimension of IP risk — one that a product-focused FTO search does not surface.Â
Understanding why product FTO and manufacturing FTO are different analyses, and what a complete manufacturing FTO needs to cover, is the starting point for any company making production decisions in markets where domestic process patent positions are commercially significant. Our analysis of the 5 most common pitfalls in FTO analyses identifies incomplete scope as the most consequential FTO error category — and in manufacturing FTO, incomplete scope most commonly means missing the process patent layer entirely.Â
Why Product FTO and Manufacturing FTO Are Not the Same AnalysisÂ
Product patents cover what is made: A product patent covers the structure, composition, or configuration of the product itself. If a product has certain physical characteristics, components, or material properties that are claimed in a product patent, and the product is made, used, sold, or imported in the relevant jurisdiction, there may be infringement regardless of how the product was made. A product FTO assesses the product’s characteristics against product patent claims. It answers the question: does this product, as defined by its features and properties, infringe any product patent?Â
Process patents cover how it is made: A process patent covers a method or sequence of steps used to manufacture a product, process a material, or perform an industrial operation. Infringement of a process patent occurs when the patented process is performed — not when the product resulting from the process is sold. In China, process patent infringement is assessed at the manufacturing stage. A company that manufactures a product using a patented process infringes the process patent at the point of production, regardless of whether the product itself infringes any product patent.Â
Why a cleared product can still infringe a process patent: The most commercially significant consequence of this distinction for manufacturing companies is that product clearance and process clearance are independent. A product that has been fully cleared against all relevant product patents may still be manufactured using a process that infringes a process patent. Conversely, a product that infringes a product patent may be manufactured by a process that is fully clear. The two analyses run on parallel tracks and must both be completed before a manufacturing decision is made in a market where process patents are actively enforced.Â
PRACTICAL EXAMPLE: A company designs and clears a battery electrode manufacturing process using a specific calendering and coating methodology. The product patent FTO clears the electrode design against all relevant product claims. But the calendering process itself — the specific sequence of pressure application, temperature control, and coating speed — may be covered by a process patent held by a domestic battery manufacturer. The product is clear; the process infringes. A manufacturing FTO that only covers product patents misses this risk entirely.Â
The Three Categories of Process Patents That Matter for Manufacturing FTOÂ
Category 1: Chemical and Materials Synthesis Process Patents Chemical synthesis routes, material processing sequences, surface treatment methods, and coating application processes. In industries including battery materials, specialty chemicals, semiconductor materials, and advanced composites, domestic Chinese manufacturers have built significant process patent portfolios around the specific synthesis and processing steps that define their competitive manufacturing advantage. These patents are often narrow but highly specific — covering a particular temperature profile, catalyst combination, or reaction sequence that is difficult to design around without materially changing the process.Â
Category 2: Mechanical Fabrication and Assembly Process Patents Machining sequences, precision forming operations, joining methods, assembly sequences, and quality control process steps. In automotive components, industrial machinery, and consumer electronics manufacturing, the production process is as commercially significant as the product design. Domestic manufacturers in these sectors have built process patent portfolios covering specific fabrication and assembly methods that differentiate their manufacturing capability from foreign competitors entering the Chinese production market.Â
Category 3: Electronic Component Manufacturing Process Patents Semiconductor fabrication steps, PCB manufacturing processes, electronic component assembly sequences, and soldering and bonding methods. In electronics manufacturing, where the dominant Chinese manufacturers have decades of accumulated process innovation, process patents covering specific manufacturing steps are among the most commercially significant IP held by domestic manufacturers. Foreign companies establishing Chinese electronics manufacturing operations face process patent risk in the fabrication and assembly steps that domestic competitors have systematically protected.Â
How Chinese Domestic Manufacturers Build and Use Process Patent PositionsÂ
Why domestic Chinese companies file process patents strategically: Chinese domestic manufacturers have a structural incentive to build process patent positions that foreign companies — which typically file around product designs rather than production processes — do not systematically cover. A domestic manufacturer’s competitive advantage often lies in its accumulated process expertise: the specific production methods that give it cost, quality, or speed advantages. Filing process patents around these methods creates an IP position that is difficult for foreign entrants to design around without fundamental changes to their production process, while the foreign company’s product patents provide no reciprocal leverage against the domestic manufacturer’s product designs.Â
How process patents are used in Chinese manufacturing disputes: Process patent enforcement in China typically proceeds through one of three mechanisms: civil litigation before the IP tribunal of the relevant intermediate people’s court, administrative enforcement through CNIPA’s patent administrative departments, or customs actions targeting imported products made using an infringing process. The administrative enforcement route is particularly significant for manufacturing FTO: a complaint to the local patent administrative department can trigger an investigation and production halt without the lead time of civil litigation. For a manufacturing company whose production line has been interrupted, the administrative enforcement mechanism represents a more immediate commercial risk than a civil infringement action.Â
The enforcement mechanism: For products manufactured using an infringing process and then exported from China, customs enforcement at the port of export is an additional risk mechanism. Under Chinese patent law, the product of an infringing process retains the infringement taint — meaning that a product manufactured in China using a patented process, and then exported, may be subject to customs seizure at Chinese ports of export even if the product itself does not infringe any product patent. This customs enforcement mechanism means that manufacturing process FTO is relevant not only for companies producing for the Chinese domestic market but also for those using Chinese production facilities for export manufacturing.Â
How to Scope a Manufacturing FTO That Covers Process Patent RiskÂ
A manufacturing FTO that covers process patent risk requires a different scope structure from a product FTO. Our guide on FTO search best practices covers the general FTO methodology. For manufacturing process FTO specifically, the scope structure has four steps that differ materially from product claim analysis.Â
- Map the manufacturing process to its discrete steps. Before searching, document the manufacturing process as a sequence of discrete steps — each step identified by its technical function, the materials inputs and outputs, the equipment used, and the process parameters (temperature, pressure, speed, chemical concentrations). This step map is the manufacturing process equivalent of a product feature description. It defines what the process FTO needs to cover and provides the mapping framework for process claim analysis.Â
- Identify the relevant process patent classification codes. Process patents are classified under different CPC and IPC codes from the product patents for the same technology area. For a battery electrode manufacturing process, the relevant process codes (electrochemical process equipment, coating and drying methods, calendar press operations) are distinct from the product codes for electrode design and composition. A manufacturing FTO scope that uses only product classification codes will miss the process patent layer for the same technology.Â
- Search both invention patents and utility models for each process step. As with product FTO, Chinese manufacturing process FTO requires separate searches covering both invention patents and utility models. Utility models can protect specific process equipment configurations and step sequences in the same way they protect product designs — and domestic manufacturers use utility models to quickly establish protection around process innovations before their invention patent applications are examined.Â
- Assess process patent scope under CNIPA claim construction. Apply the same CNIPA literal claim construction standard to process claim analysis as to product claim analysis. A process claim that describes a specific temperature range, pressure profile, or chemical concentration should be assessed against the actual process parameters used — not against a broader US or EPO claim scope interpretation. Design-around options for process patents often involve modifying specific process parameters to move outside the literal claim scope, which requires the Chinese construction standard to assess accurately.Â
How Our FTO Service Covers Manufacturing Process PatentsÂ
Our freedom to operate service covers manufacturing process FTO as a distinct analysis from product FTO, with process step mapping, process-specific patent classification code search, separate invention patent and utility model coverage for each process step, and claim scope assessment under CNIPA literal claim construction. For manufacturing companies establishing or expanding production in China, we structure the manufacturing FTO to run in parallel with the product FTO — ensuring that both the product and the production process are cleared before the first manufacturing decision commits capital to a production line that may be blocked by a domestic process patent holder.Â
Establishing manufacturing in China? Product FTO and manufacturing FTO are separate analyses. Our service covers the process patent layer — synthesis routes, fabrication sequences, and assembly methods — that product-focused searches miss.  →  Contact UsÂ
Conclusion: The TakeawayÂ
Product clearance and process clearance are independent analyses. A product that has been fully cleared against product patents may still be manufactured using a process that infringes a process patent. In markets where domestic manufacturers have systematically built process patent positions around the production methods that define their competitive advantage — and where those patents are actively enforced through administrative, civil, and customs mechanisms — the manufacturing FTO that covers only product patents is answering half the question.Â
The complete manufacturing FTO maps the production process to its discrete steps, identifies the relevant process patent classification codes, covers both invention patents and utility models for each step, and applies the local claim construction standard to assess process patent scope accurately. That is the analysis that gives manufacturing companies a production decision based on the full IP picture — not just the product half of it.Â
