C08K 5/21
Urea
Official title: Urea; Derivatives thereof, e.g. biuret
C08K5/21 (Urea) appears on 327 US grants and 351 published applications in this corpus.
Search patents in C08K- Granted patents
- 327
- Published applications
- 351
- Assignees
- 261
- Inventors
- 1,038
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 10 | 0 |
| 1978 | 12 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 10 | 0 |
| 1993 | 6 | 0 |
| 1994 | 8 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 5 | 3 |
| 2003 | 3 | 2 |
| 2004 | 2 | 6 |
| 2005 | 1 | 7 |
| 2006 | 3 | 6 |
| 2007 | 1 | 8 |
| 2008 | 1 | 9 |
| 2009 | 7 | 6 |
| 2010 | 7 | 5 |
| 2011 | 4 | 13 |
| 2012 | 5 | 12 |
| 2013 | 6 | 7 |
| 2014 | 6 | 17 |
| 2015 | 6 | 22 |
| 2016 | 12 | 21 |
| 2017 | 14 | 9 |
| 2018 | 11 | 23 |
| 2019 | 13 | 15 |
| 2020 | 13 | 35 |
| 2021 | 21 | 22 |
| 2022 | 13 | 28 |
| 2023 | 17 | 18 |
| 2024 | 13 | 23 |
| 2025 | 16 | 14 |
| 2026 | 12 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods of scavenging formaldehyde from passing air25 Aug 2026US 12,716,000 B2Swimc LLC
- Rheology control agent11 Aug 2026US 12,703,769 B2BYK-Chemie GmbH
- Zwitterionic crosslinkers, hydrogels comprising zwitterionic crosslinkers, and methods for making and using21 Jul 2026US 12,686,758 B2University of Idaho
- Aqueous dispersion of polymer particles and uses thereof as an adhesive composition19 May 2026US 12,630,660 B2Arkema France
- Binder compositions and composite19 May 2026US 12,630,705 B2Bakelite Chemicals LLC
- Clearcoat coating materials for plastic parts17 Sep 2026US 2026/0275154 A1BASF Coatings GmbH
- Protein-containing adhesive compositions17 Sep 2026US 2026/0275177 A1
- One component composition based on epoxy resins10 Sep 2026US 2026/0265593 A1Henkel AG & Co. KGaA
- Epoxy resin composition and method of production of same20 Aug 2026US 2026/0242590 A1Nippon Steel Corporation
- A composition for dyeing a substrate and use thereof13 Aug 2026US 2026/0234426 A1Staedtler SE
Most cited
By later US patents
- Starchy polymeric mixture particularly for the production of films and the like and a method for its production75US 5,234,977 ANovamont S. p. A. · 1993
- Flexible polyurethane foam having a high fire resistance59US 4,895,878 ARecticel · 1990
- Starch/polymer mixture, process for the preparation thereof, and products obtainable therefrom51US 5,346,936 AEMS-Inventa AG · 1994
- Aqueous fire-retardant non-corrosive composition for topical application to products and articles44US 8,586,657 B22013
- Melt extrudable polyvinyl alcohol compositions41US 3,997,489 AE. I. Du Pont de Nemours and Company · 1976