H01B 3/421
Polyesters
Official title: {Polyesters}
H01B3/421 (Polyesters) appears on 369 US grants and 313 published applications in this corpus.
Search patents in H01B- Granted patents
- 369
- Published applications
- 313
- Assignees
- 239
- Inventors
- 1,059
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 9 | 0 |
| 1978 | 13 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 10 | 0 |
| 1984 | 8 | 0 |
| 1985 | 9 | 0 |
| 1986 | 10 | 0 |
| 1987 | 1 | 0 |
| 1988 | 9 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 12 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 3 |
| 2003 | 1 | 2 |
| 2004 | 0 | 7 |
| 2005 | 2 | 7 |
| 2006 | 3 | 6 |
| 2007 | 3 | 8 |
| 2008 | 3 | 8 |
| 2009 | 0 | 6 |
| 2010 | 3 | 12 |
| 2011 | 7 | 7 |
| 2012 | 3 | 19 |
| 2013 | 4 | 17 |
| 2014 | 9 | 14 |
| 2015 | 9 | 20 |
| 2016 | 12 | 22 |
| 2017 | 16 | 24 |
| 2018 | 18 | 28 |
| 2019 | 20 | 24 |
| 2020 | 20 | 11 |
| 2021 | 9 | 14 |
| 2022 | 9 | 17 |
| 2023 | 14 | 12 |
| 2024 | 9 | 7 |
| 2025 | 5 | 12 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hybrid resins for high voltage applications8 Sep 2026US 12,729,260 B2Elantas Europe S.R.L.
- Copolyetherester1 Sep 2026US 12,723,153 B2Celanese Polymers Holding, Inc.
- Shielded busbar25 Aug 2026US 12,719,253 B2Eae Elektrik Asansor Endustri Insaat Sanayi Veticaret Anonim Sir
- Polyetherester21 Jul 2026US 12,686,769 B2Celanese Polymers Holding, Inc.
- PET based polymeric matrix for electric wires12 Aug 2025US 12,384,877 B2Acome
- Unimpeded row system8 Oct 2026US 2026/0312537 A1Wtec, LLC
- Electrical apparatus comprising at least one gelled material24 Sep 2026US 2026/0290681 A1Arkema France
- Method of obtaining insulating coating composition, coating composition and conductive materials comprising the same6 Aug 2026US 2026/0226309 A1Weg Tintas Ltda
- Enamel coated fusible element30 Jul 2026US 2026/0221370 A1Littelfuse, Inc.
- Thermally conductive dielectric coatings16 Jul 2026US 2026/0201237 A1Henkel AG & Co. KGaA
Most cited
By later US patents
- Foamed electrical wire and a method of producing the same208US 9,142,334 B2Furukawa Electric Co., Ltd. · 2015
- Polymer composition and electrical wire insulation73US 5,660,932 ARaychem Corporation · 1997
- Corona-resistant wire enamel compositions and conductors insulated therewith64US 4,546,041 AGeneral Electric Company · 1985
- Enameled wire62US 6,906,258 B2Kabushiki Kaisha Toshiba · 2005
- Coverlay for printed circuit boards55US 5,674,595 AInternational Business Machines Corporation · 1997