D21H 13/00
Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
Official title: Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material (chemical features in the manufacture of artificial fibres D01F)
D21H13/00 (Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material) appears on 1,516 US grants and 1,374 published applications in this corpus.
Search patents in D21H- Granted patents
- 1,516
- Published applications
- 1,374
- Assignees
- 772
- Inventors
- 3,334
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 29 | 0 |
| 1977 | 19 | 0 |
| 1978 | 21 | 0 |
| 1979 | 19 | 0 |
| 1980 | 13 | 0 |
| 1981 | 33 | 0 |
| 1982 | 19 | 0 |
| 1983 | 27 | 0 |
| 1984 | 27 | 0 |
| 1985 | 33 | 0 |
| 1986 | 16 | 0 |
| 1987 | 22 | 0 |
| 1988 | 26 | 0 |
| 1989 | 23 | 0 |
| 1990 | 24 | 0 |
| 1991 | 26 | 0 |
| 1992 | 30 | 0 |
| 1993 | 21 | 0 |
| 1994 | 12 | 0 |
| 1995 | 29 | 0 |
| 1996 | 18 | 0 |
| 1997 | 24 | 0 |
| 1998 | 27 | 0 |
| 1999 | 32 | 0 |
| 2000 | 28 | 0 |
| 2001 | 38 | 6 |
| 2002 | 25 | 31 |
| 2003 | 28 | 55 |
| 2004 | 27 | 41 |
| 2005 | 22 | 45 |
| 2006 | 14 | 42 |
| 2007 | 19 | 62 |
| 2008 | 19 | 43 |
| 2009 | 12 | 46 |
| 2010 | 38 | 57 |
| 2011 | 33 | 47 |
| 2012 | 38 | 58 |
| 2013 | 43 | 57 |
| 2014 | 36 | 53 |
| 2015 | 30 | 84 |
| 2016 | 49 | 57 |
| 2017 | 47 | 63 |
| 2018 | 35 | 59 |
| 2019 | 40 | 60 |
| 2020 | 41 | 101 |
| 2021 | 55 | 58 |
| 2022 | 83 | 61 |
| 2023 | 51 | 63 |
| 2024 | 37 | 45 |
| 2025 | 36 | 42 |
| 2026 | 22 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Impregnating coating layer for insulating sheetsand multilayer laminates15 Sep 2026US 12,734,766 B2Coveme S.P.A.
- Moving fluid in a rotating cylinder11 Aug 2026US 12,703,945 B2
- Filter material for air filter and method for producing filter material14 Jul 2026US 12,678,724 B2Hokuetsu Corporation
- Electrically conductive smart papers7 Jul 2026US 12,674,279 B2University of Washington
- Fiber diameter measuring device, inorganic fiber sheet producing device, method for measuring fiber diameter, and method for producing inorganic fiber sheet30 Jun 2026US 12,668,925 B2Maftec Co., Ltd.
- Method for manufacturing paper-making filler using mixed solution of organic fiber and inorganic compound and use thereof1 Oct 2026US 2026/0297850 A1MarinePad Co., Ltd.
- Polyimide fibre paper1 Oct 2026US 2026/0297851 A1Dupont Electronics, Inc.
- Method for preparing food-grade glassine paper using mycelium from submerged fermentation of edible fungi and food-grade glassine paper24 Sep 2026US 2026/0286616 A1Jilin Agricultural University
- Ceiling basemat water reduction through strategic use of pressing and vacuuming17 Sep 2026US 2026/0275636 A1USG Interiors, Inc.
- Papermaking mat and method for producing paper making mat3 Sep 2026US 2026/0258606 A1Ibiden Co., Ltd.
Most cited
By later US patents
- Process for making unitary fibrous structure comprising randomly distributed cellulosic fibers and non-randomly distributed synthetic fibers1,408US 7,067,038 B2The Procter & Gamble Company · 2006
- Method for making a fibrous structure comprising cellulosic and synthetic fibers1,393US 7,354,502 B2The Procter & Gamble Company · 2008
- Fibrous structures containing immobilized particulate matter181US 5,486,410 AHoechst Celanese Corporation · 1996
- Dispersible nonwoven fabric and method of making same166US 5,935,880 A1999
- Asbestiform crystalline calcium sodium or lithium phosphate, preparation and compositions161US 4,346,028 AMonsanto Company · 1982