B01D 71/36
Polytetrafluoroethylene
B01D71/36 (Polytetrafluoroethylene) appears on 564 US grants and 796 published applications in this corpus.
Search patents in B01D- Granted patents
- 564
- Published applications
- 796
- Assignees
- 361
- Inventors
- 1,683
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 10 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 2 |
| 2002 | 4 | 7 |
| 2003 | 4 | 6 |
| 2004 | 7 | 9 |
| 2005 | 5 | 14 |
| 2006 | 2 | 17 |
| 2007 | 7 | 12 |
| 2008 | 6 | 13 |
| 2009 | 7 | 28 |
| 2010 | 11 | 29 |
| 2011 | 10 | 36 |
| 2012 | 14 | 24 |
| 2013 | 15 | 40 |
| 2014 | 24 | 39 |
| 2015 | 21 | 44 |
| 2016 | 34 | 45 |
| 2017 | 25 | 32 |
| 2018 | 26 | 40 |
| 2019 | 28 | 34 |
| 2020 | 34 | 68 |
| 2021 | 26 | 54 |
| 2022 | 39 | 49 |
| 2023 | 33 | 53 |
| 2024 | 28 | 48 |
| 2025 | 35 | 29 |
| 2026 | 21 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Point of use or point of dispense filter with multiple pleat packs15 Sep 2026US 12,734,488 B2Entegris, Inc.
- Method for producing treatment liquid4 Aug 2026US 12,698,454 B2FUJIFILM Corporation
- Filtration membrane and method of production thereof28 Jul 2026US 12,691,422 B2NewSouth Innovations Pty Limited
- Aeration module21 Jul 2026US 12,685,971 B2Sumitomo Electric Fine Polymer, Inc.
- Filter assembly for a therapeutic gas delivery device23 Jun 2026US 12,661,614 B2Mallinckrodt Pharmaceuticals Ireland Limited
- Filter assembly for a therapeutic gas delivery device1 Oct 2026US 2026/0295513 A1Mallinckrodt Pharmaceuticals Ireland Limited
- Fluorine-free hydrophobic permeable material27 Aug 2026US 2026/0250478 A1Donaldson Company, Inc.
- Separator for a battery, battery and method for producing a separator27 Aug 2026US 2026/0254048 A1INL - International Iberian Nanotechnology Laboratory
- Waterproof member and waterproof case30 Jul 2026US 2026/0216629 A1Nitto Denko Corporation
- Pyrolysis oil purification using successive extractions23 Jul 2026US 2026/0209612 A1Sabic Global Technologies B.V.
Most cited
By later US patents
- Process for producing porous products1,316US 3,953,566 AW. L. Gore & Associates, Inc. · 1976
- Porous products and process therefor909US 4,187,390 AW. L. Gore & Associates, Inc. · 1980
- Very highly stretched polytetrafluoroethylene and process therefor330US 3,962,153 AW. L. Gore & Associates, Inc. · 1976
- Porous PTFE materials and articles produced therefrom267US 7,306,729 B2Gore Enterprise Holdings, Inc. · 2007
- Porpous PTFE film and a manufacturing method therefor264US 5,476,589 AW. L. Gore & Associates, Inc. · 1995