D21H 17/57
Polyureas
Official title: Polyureas; Polyurethanes
D21H17/57 (Polyureas) appears on 127 US grants and 110 published applications in this corpus.
Search patents in D21H- Granted patents
- 127
- Published applications
- 110
- Assignees
- 90
- Inventors
- 329
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 2 |
| 2003 | 2 | 4 |
| 2004 | 1 | 2 |
| 2005 | 0 | 5 |
| 2006 | 1 | 1 |
| 2007 | 1 | 5 |
| 2008 | 3 | 5 |
| 2009 | 0 | 2 |
| 2010 | 0 | 3 |
| 2011 | 0 | 3 |
| 2012 | 0 | 1 |
| 2013 | 4 | 6 |
| 2014 | 1 | 5 |
| 2015 | 4 | 11 |
| 2016 | 7 | 5 |
| 2017 | 7 | 4 |
| 2018 | 2 | 9 |
| 2019 | 4 | 4 |
| 2020 | 4 | 3 |
| 2021 | 9 | 6 |
| 2022 | 6 | 5 |
| 2023 | 0 | 4 |
| 2024 | 3 | 6 |
| 2025 | 2 | 4 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Coated articles and their method of manufacturing and use28 Apr 2026US 12,612,733 B2Surfactor Germany GmbH
- Pouched product for oral use21 Oct 2025US 12,446,612 B2Swedish Match North Europe AB
- Manufacturing and quality testing method and manufacturing device for a printed product capable of resisting abnormal environmental changes and operating in all weather and suitable for hygiene management operations, and the printed product29 Apr 2025US 12,285,956 B2
- 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
- Method for Producing a Composite Material that is Free of Melamine-Formaldehyde Resin13 Aug 2026US 2026/0234869 A1Flooring Technologies Ltd.
- Water repellent composition2 Jul 2026US 2026/0184907 A1Daikin Industries, Ltd.
- Coating agent and laminate12 Feb 2026US 2026/0042931 A1Mitsui Chemicals, Inc.
- Fluorine-containing compound13 Nov 2025US 2025/0346778 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Wet strength resins90US 4,537,657 AHercules Incorporated · 1985
- Wet strength resin from aminopolyamide-polyureylene63US 4,501,862 AHercules Incorporated · 1985
- Methods and agents for improving paper printability and strength47US 5,824,190 ACytec Technology Corp. · 1998
- Isocyanate modified cellulose products and method for their manufacture39US 5,008,359 AWeyerhaeuser Company · 1991
- Wetlaid nonwovens on high speed machines38US 5,238,534 AJames River Corporation of Virginia · 1993