D21H 17/55
Polyamides
Official title: Polyamides; Polyaminoamides; Polyester-amides
D21H17/55 (Polyamides) appears on 384 US grants and 284 published applications in this corpus.
Search patents in D21H- Granted patents
- 384
- Published applications
- 284
- Assignees
- 140
- Inventors
- 694
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 8 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 8 | 0 |
| 1996 | 8 | 0 |
| 1997 | 13 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 13 | 0 |
| 2001 | 15 | 3 |
| 2002 | 11 | 3 |
| 2003 | 6 | 10 |
| 2004 | 6 | 10 |
| 2005 | 3 | 7 |
| 2006 | 3 | 8 |
| 2007 | 8 | 7 |
| 2008 | 1 | 8 |
| 2009 | 0 | 11 |
| 2010 | 6 | 9 |
| 2011 | 10 | 8 |
| 2012 | 7 | 8 |
| 2013 | 10 | 5 |
| 2014 | 10 | 14 |
| 2015 | 9 | 41 |
| 2016 | 26 | 14 |
| 2017 | 21 | 8 |
| 2018 | 13 | 14 |
| 2019 | 7 | 11 |
| 2020 | 13 | 14 |
| 2021 | 11 | 15 |
| 2022 | 5 | 12 |
| 2023 | 8 | 10 |
| 2024 | 12 | 12 |
| 2025 | 6 | 8 |
| 2026 | 7 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Impregnating coating layer for insulating sheetsand multilayer laminates15 Sep 2026US 12,734,766 B2Coveme S.P.A.
- Composition for improving softness of tissue and/or towel products12 May 2026US 12,624,503 B2Solenis Technologies, L.P.
- Process for manufacturing wet strength resins21 Apr 2026US 12,606,673 B2Kemira Oyj
- Wet laid paper and paperboard products with high wet strength and method of making the same31 Mar 2026US 12,590,413 B2First Quality Tissue, LLC
- GPAM compositions and methods17 Feb 2026US 12,553,188 B2Kemira Oyj
- 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.
- Woven fabric30 Jul 2026US 2026/0218420 A1Spinnova Oyj
- Surface-modified fibers, method for producing same, and molded article using surface-modified fibers23 Jul 2026US 2026/0210032 A1Kuraray Co., Ltd.
- Nonwoven fabrics, products comprising the same and methods for manufacturing nonwoven fabrics23 Jul 2026US 2026/0210049 A1Spinnova Oyj
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
- Soft absorbent tissue paper with high permanent wet strength192US 5,223,096 AThe Procter & Gamble Company · 1993
- Creping adhesives containing polyvinyl alcohol and cationic polyamide resins175US 4,528,316 AKimberly-Clark Corporation · 1985
- Multi-elevational tissue paper containing selectively disposed chemical papermaking additive159US 5,840,403 AThe Procter & Gamble Company · 1998