# The Discovery of Teflon

> This 1941 patent describes the creation of polytetrafluoroethylene, a slippery, heat-resistant plastic discovered by accident that became known as Teflon.

- **Patent:** US 2230654
- **Original title:** Tetrafluoroethylene polymers
- **Owner:** KINETIC CHEMICALS Inc
- **Granted:** 1941
- **Status:** Public domain (expired)
- **Times cited:** 74
- **Field:** materials, mechanical, aerospace, consumer_electronics

## What it does

The patent covers the polymerization of tetrafluoroethylene gas into a solid, white, waxy material. This substance is chemically inert, meaning it does not react with most other chemicals, and it possesses an extremely low coefficient of friction. The process involves subjecting the gas to high pressure in the presence of a catalyst to create long chains of carbon and fluorine atoms.

## What it does NOT cover

- Does not cover the application of the material as a non-stick coating for cookware.
- Does not cover the manufacturing process for other fluorinated polymers like PVDF.
- Does not cover the specific chemical synthesis of the monomer tetrafluoroethylene itself.

## The clever bit

Plunkett discovered the polymer by accident when a cylinder of gas appeared empty but still had weight; he realized the gas had polymerized into a solid inside the tank, changing chemistry forever.

## Real-world examples

1. Non-stick frying pans
2. Chemical-resistant gaskets and seals
3. Insulation for high-performance electrical wiring
4. Medical implants

## Why it matters

This patent marks the birth of the fluoropolymer industry. It enabled the development of materials that can survive extreme chemical environments and high temperatures, which were essential for the Manhattan Project and later for aerospace and consumer goods.

## Frequently asked questions

### What does The Discovery of Teflon cover?

This 1941 patent describes the creation of polytetrafluoroethylene, a slippery, heat-resistant plastic discovered by accident that became known as Teflon.

### Who owns patent US 2230654?

KINETIC CHEMICALS Inc owns this patent, granted in 1941.

### When does this patent expire?

This patent has expired and is now in the public domain — anyone can use the invention freely.

### What is patent US 2230654 cited by?

This patent has been cited by 74 later patents that build on its ideas.

### What problem does this patent solve?

This patent marks the birth of the fluoropolymer industry. It enabled the development of materials that can survive extreme chemical environments and high temperatures, which were essential for the Manhattan Project and later for aerospace and consumer goods.

### What does this patent NOT cover?

Does not cover the application of the material as a non-stick coating for cookware.

**Full plain-English explainer:** https://patentbrief.org/patent/us/2230654/teflon-ptfe-polymer

**Original patent:** https://patents.google.com/patent/US2230654

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._


## Related patents

Semantically similar inventions in the PatentBrief corpus:

- [Making Strong, Porous PTFE: The Gore-Tex Process](https://patentbrief.org/patent/us/3953566/gore-tex-expanded-ptfe) — This patent describes a specific process for rapidly stretching a highly crystalline form of PTFE plastic to create a strong, porous material with a unique internal structure, forming the basis for products like Gore-Tex.
- [How DuPont Invented Neoprene Synthetic Rubber](https://patentbrief.org/patent/us/1967861/neoprene-synthetic-rubber) — A 1934 patent describing the chemical process to turn chlorobutadiene into a durable, oil-resistant synthetic rubber known as Neoprene.
- [How Leo Baekeland Invented Bakelite, the First Synthetic Plastic](https://patentbrief.org/patent/us/942699/bakelite-synthetic-plastic) — A 1909 patent for creating a durable, heat-resistant material by reacting phenol and formaldehyde, marking the birth of the modern plastics industry.
- [How Wallace Carothers Invented Nylon](https://patentbrief.org/patent/us/2130523/nylon-polyamide-carothers) — The foundational 1935 patent for synthetic linear polyamides, the chemical process that created the material we now call nylon.
- [How Spandex Elastic Fibers Are Chemically Engineered](https://patentbrief.org/patent/us/2929804/spandex-lycra-elastic-fiber) — DuPont's 1960 patent for a stretchy, durable synthetic fiber made from segmented polymers, which became the foundation for modern Spandex.