D21H 17/54
Obtained by reactions forming in the main chain of the macromolecule a
Official title: obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
D21H17/54 (Obtained by reactions forming in the main chain of the macromolecule a) appears on 760 US grants and 577 published applications in this corpus.
Search patents in D21H- Granted patents
- 760
- Published applications
- 577
- Assignees
- 311
- Inventors
- 1,463
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 9 | 0 |
| 1978 | 11 | 0 |
| 1979 | 8 | 0 |
| 1980 | 11 | 0 |
| 1981 | 11 | 0 |
| 1982 | 10 | 0 |
| 1983 | 12 | 0 |
| 1984 | 7 | 0 |
| 1985 | 10 | 0 |
| 1986 | 7 | 0 |
| 1987 | 9 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 10 | 0 |
| 1991 | 8 | 0 |
| 1992 | 15 | 0 |
| 1993 | 10 | 0 |
| 1994 | 12 | 0 |
| 1995 | 13 | 0 |
| 1996 | 14 | 0 |
| 1997 | 23 | 0 |
| 1998 | 18 | 0 |
| 1999 | 27 | 0 |
| 2000 | 29 | 0 |
| 2001 | 33 | 9 |
| 2002 | 27 | 16 |
| 2003 | 11 | 29 |
| 2004 | 22 | 20 |
| 2005 | 9 | 20 |
| 2006 | 5 | 20 |
| 2007 | 12 | 19 |
| 2008 | 7 | 18 |
| 2009 | 2 | 26 |
| 2010 | 10 | 20 |
| 2011 | 16 | 22 |
| 2012 | 14 | 16 |
| 2013 | 18 | 21 |
| 2014 | 19 | 23 |
| 2015 | 22 | 60 |
| 2016 | 33 | 22 |
| 2017 | 35 | 22 |
| 2018 | 20 | 29 |
| 2019 | 18 | 20 |
| 2020 | 23 | 21 |
| 2021 | 21 | 25 |
| 2022 | 18 | 18 |
| 2023 | 9 | 18 |
| 2024 | 17 | 25 |
| 2025 | 9 | 13 |
| 2026 | 13 | 25 |
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.
- Foam-assisted application of uncooked starch and dry strength agents to paper products8 Sep 2026US 12,729,486 B2Solenis Technologies, L.P.
- Filter material for air filter and method for producing filter material14 Jul 2026US 12,678,724 B2Hokuetsu Corporation
- Board, method for manufacturing a board and a panel comprising such board material26 May 2026US 12,637,810 B2Unilin BV
- Composition for improving softness of tissue and/or towel products12 May 2026US 12,624,503 B2Solenis Technologies, L.P.
- Use of Polyurethane Elastomers Based on or Use of Kit-Of-Parts Comprising MDI-Polyadipate Prepolymers and Polyamine Chain-Extenders in Pulp and Paper Applications, Preferably in the Manufacture of Die Cutting Pads, Anvil Covers, Rollers and Zero Crush Wheels8 Oct 2026US 2026/0308850 A1Covestro Deutschland AG
- Polyimide fibre paper1 Oct 2026US 2026/0297851 A1Dupont Electronics, Inc.
- Method for Producing a Composite Material that is Free of Melamine-Formaldehyde Resin13 Aug 2026US 2026/0234869 A1Flooring Technologies Ltd.
- Composition13 Aug 2026US 2026/0234871 A1Daikin Industries, Ltd.
- Paper supports for confectionery products and method fo preparation thereof13 Aug 2026US 2026/0234873 A1Perfetti Van Melle S.P.A.
Most cited
By later US patents
- Production of paper and paperboard198US 4,753,710 AAllied Colloids Limited · 1988
- Method for making soft layered tissues197US 5,494,554 AKimberly-Clark Corporation · 1996
- Functional ionene compositions and their use196US 4,075,136 ACalgon Corporation · 1978
- Soft absorbent tissue paper with high permanent wet strength192US 5,223,096 AThe Procter & Gamble Company · 1993
- Functional ionene compositions and their use178US 4,166,894 ACalgon Corporation · 1979