Electrical Wire with a Heat-Resistant Plastic Coating
This patent describes an electrical wire coated with a specific plastic blend, a copolymer of tetrafluoroethylene and perfluoro(propyl vinyl ether), designed to withstand high temperatures and improve durability.
Original patent title: “Coated electrical wire”
This patent describes an electrical wire coated with a specific plastic blend, a copolymer of tetrafluoroethylene and perfluoro(propyl vinyl ether), designed to withstand high temperatures and improve durability. Granted in 2026.
Coverage
What does this patent actually cover?
This patent details an electrical wire featuring a core wire surrounded by a special coating layer. This coating is made from a copolymer, which is a type of plastic built from two different molecular units: tetrafluoroethylene and perfluoro(propyl vinyl ether). The patent specifies precise characteristics for this copolymer: the perfluoro(propyl vinyl ether) unit must make up 4.8 to 5.5% of the total monomer units by mass. Additionally, the plastic's melt flow rate at 372°C must be between 28.0 and 37.0 g/10 min, and it needs to have 50 or fewer functional groups per 10^6 main-chain carbon atoms. For example, this type of wire could be used in aircraft engines where wiring must endure extreme heat and harsh chemicals.
The gap
What does this patent NOT cover?
- Does not cover electrical wires coated with materials other than the specified tetrafluoroethylene and perfluoro(propyl vinyl ether) copolymer.
- Does not cover coatings where the perfluoro(propyl vinyl ether) unit content is outside the 4.8 to 5.5% by mass range.
- Does not cover coatings where the copolymer's melt flow rate at 372°C is outside the 28.0 to 37.0 g/10 min range.
- Does not cover coatings where the copolymer has more than 50 functional groups per 10^6 main-chain carbon atoms.
- Does not cover non-electrical wires, such as optical fibers, regardless of their coating.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
Key facts
What made this novel
The noveltynoveltyThe requirement that an invention be different from anything publicly known before its priority date.Read more → lies in the precise combination of the tetrafluoroethylene and perfluoro(propyl vinyl ether) copolymer, specifically optimized for its composition, melt flow rate, and low number of functional groups. This exact formulation likely provides a unique balance of high-temperature performance, chemical resistance, and ease of manufacturing for electrical wire coatings.
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Aerospace wiring harnesses
Automotive engine compartment wiring
Industrial machinery control cables
High-temperature sensor wiring
Medical device internal wiring
Why it matters
The bigger picture
High-performance electrical wires are crucial for safety and reliability in demanding environments like aerospace, automotive, and industrial settings. This patent's specific formulation for a fluoropolymer coating likely offers enhanced properties, such as superior heat resistance, chemical inertness, and improved processability, compared to general-purpose wire coatings. Such advancements contribute to more durable and safer electrical systems in critical applications.
Filed
August 22, 2023
Granted
September 15, 2026
Market context
Who's building on this
Companies in this space
Major fluoropolymer manufacturers like Chemours, Daikin, and AGC are continually developing advanced materials for high-performance applications. Wire and cable manufacturers such as Prysmian Group, Nexans, and Leoni would be interested in integrating such specialized coatings into their product lines to meet stringent industry standards for heat and chemical resistance. These companies drive innovation in material science to enhance electrical system reliability.
Market impact
This patent, if widely adopted, could enable new product lines for electrical wires that require superior performance in extreme conditions, potentially setting new benchmarks for durability and safety. It could also block competitors from using this specific, optimized coating formulation, thereby securing a competitive advantage for the assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more → in niche high-value markets. The focus is on enhancing specific performance envelopes rather than creating entirely new market categories.
Claim 1 — Plain English
What this patent covers
This patent details an electrical wire featuring a core wire surrounded by a special coating layer. This coating is made from a copolymer, which is a type of plastic built from two different molecular units: tetrafluoroethylene and perfluoro(propyl vinyl ether). The patent specifies precise characteristics for this copolymer: the perfluoro(propyl vinyl ether) unit must make up 4.8 to 5.5% of the total monomer units by mass. Additionally, the plastic's melt flow rate at 372°C must be between 28.0 and 37.0 g/10 min, and it needs to have 50 or fewer functional groups per 10^6 main-chain carbon atoms. For example, this type of wire could be used in aircraft engines where wiring must endure extreme heat and harsh chemicals.
The clever bit
The novelty lies in the precise combination of the tetrafluoroethylene and perfluoro(propyl vinyl ether) copolymer, specifically optimized for its composition, melt flow rate, and low number of functional groups. This exact formulation likely provides a unique balance of high-temperature performance, chemical resistance, and ease of manufacturing for electrical wire coatings.
What it does not cover
- Does not cover electrical wires coated with materials other than the specified tetrafluoroethylene and perfluoro(propyl vinyl ether) copolymer.
- Does not cover coatings where the perfluoro(propyl vinyl ether) unit content is outside the 4.8 to 5.5% by mass range.
- Does not cover coatings where the copolymer's melt flow rate at 372°C is outside the 28.0 to 37.0 g/10 min range.
- Does not cover coatings where the copolymer has more than 50 functional groups per 10^6 main-chain carbon atoms.
- Does not cover non-electrical wires, such as optical fibers, regardless of their coating.
Patent timeline
Application submitted to the patent office
Patent officially issued
PatentBrief Score
Impact Score
Early stage
Citation count
0/40
No citations yet
Claim breadth
0/20
Narrow claimsclaimsThe numbered statements at the end of a patent that legally define what the inventor owns.Read more →
Recency
20/20
Granted within 5 years
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$17K – $54K
Midpoint $34K · 16.9 yr remaining · industry ×1.4
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
Claim text not yet imported for this patent
Concepts involved
Cite this patent
(2026). Electrical Wire with a Heat-Resistant Plastic Coating (U.S. Patent No. 12,738,390). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/12738390/coated-electrical-wire
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does Electrical Wire with a Heat-Resistant Plastic Coating cover?
This patent describes an electrical wire coated with a specific plastic blend, a copolymer of tetrafluoroethylene and perfluoro(propyl vinyl ether), designed to withstand high temperatures and improve durability.
When does this patent expire?
This patent is expected to expire on September 15, 2046, when the invention enters the public domain.
What problem does this patent solve?
High-performance electrical wires are crucial for safety and reliability in demanding environments like aerospace, automotive, and industrial settings. This patent's specific formulation for a fluoropolymer coating likely offers enhanced properties, such as superior heat resistance, chemical inertness, and improved processability, compared to general-purpose wire coatings. Such advancements contribute to more durable and safer electrical systems in critical applications.
What does this patent NOT cover?
Does not cover electrical wires coated with materials other than the specified tetrafluoroethylene and perfluoro(propyl vinyl ether) copolymer.
Patent monitoring