C09K 21/00
Fireproofing materials
Official title: Fireproofing materials (for use in a particular application, see the relevant places, e.g. fireproofing of wood B27K, of polymers C08, of textiles D06M, of paper D21H; fireproof paints C09D5/18)
C09K21/00 (Fireproofing materials) appears on 1,962 US grants and 2,134 published applications in this corpus.
Search patents in C09K- Granted patents
- 1,962
- Published applications
- 2,134
- Assignees
- 1,147
- Inventors
- 4,750
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 27 | 0 |
| 1977 | 19 | 0 |
| 1978 | 29 | 0 |
| 1979 | 23 | 0 |
| 1980 | 27 | 0 |
| 1981 | 30 | 0 |
| 1982 | 15 | 0 |
| 1983 | 16 | 0 |
| 1984 | 19 | 0 |
| 1985 | 22 | 0 |
| 1986 | 18 | 0 |
| 1987 | 19 | 0 |
| 1988 | 12 | 0 |
| 1989 | 19 | 0 |
| 1990 | 14 | 0 |
| 1991 | 33 | 0 |
| 1992 | 30 | 0 |
| 1993 | 18 | 0 |
| 1994 | 13 | 0 |
| 1995 | 25 | 0 |
| 1996 | 22 | 0 |
| 1997 | 17 | 0 |
| 1998 | 29 | 0 |
| 1999 | 33 | 0 |
| 2000 | 47 | 0 |
| 2001 | 51 | 15 |
| 2002 | 37 | 32 |
| 2003 | 41 | 61 |
| 2004 | 32 | 59 |
| 2005 | 30 | 55 |
| 2006 | 37 | 57 |
| 2007 | 15 | 83 |
| 2008 | 24 | 70 |
| 2009 | 31 | 77 |
| 2010 | 38 | 82 |
| 2011 | 47 | 115 |
| 2012 | 49 | 82 |
| 2013 | 57 | 99 |
| 2014 | 73 | 105 |
| 2015 | 67 | 114 |
| 2016 | 69 | 121 |
| 2017 | 71 | 130 |
| 2018 | 83 | 107 |
| 2019 | 108 | 115 |
| 2020 | 87 | 95 |
| 2021 | 72 | 80 |
| 2022 | 61 | 104 |
| 2023 | 62 | 89 |
| 2024 | 67 | 84 |
| 2025 | 44 | 65 |
| 2026 | 33 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Copolyetherester1 Sep 2026US 12,723,153 B2Celanese Polymers Holding, Inc.
- Fire-retardant-treated wood composite panels for exterior applications or weather exposure during constructions1 Sep 2026US 12,723,401 B2Louisiana-Pacific Corp.
- Polyetherester21 Jul 2026US 12,686,769 B2Celanese Polymers Holding, Inc.
- High-heat and high-shear-resistant high-flame-retardant halogen-free flame-retardant compound system and use30 Jun 2026US 12,668,683 B2Jiangsu Liside New Material Co., Ltd.
- Fire protection system30 Jun 2026US 12,668,745 B2
- Additives for Thermal Management Fluid and Thermal Management Fluid Compositions Including Same1 Oct 2026US 2026/0297410 A1SK Innovation Co., Ltd.
- Storage stable liquid fugitive colored fire-retardant concentrates1 Oct 2026US 2026/0297428 A1Perimeter Solutions LP
- Hydrophobic lignin-based in-built fire retardant, its preparation and application in polyurethane foam17 Sep 2026US 2026/0275197 A1Nano and Advanced Materials Institute Limited
- Reactive gel material for sustained water-based reactions20 Aug 2026US 2026/0242632 A1
- Fire retardant compositions containing one or more surfactants13 Aug 2026US 2026/0233045 A1Perimeter Solutions LP
Most cited
By later US patents
- Foaming surfactant compositions383US 4,565,647 AThe Procter & Gamble Company · 1986
- Fire retardant compositions and methods for preserving wood products255US 6,620,349 B12003
- Fire retardant foams comprising expandable graphite, amine salts and phosphorous polyols178US 5,173,515 ABayer Aktiengesellschaft · 1992
- Fire retardant intumescent coating for lignocellulosic materials158US 5,968,669 AJ. M. Huber Corporation · 1999
- Heat expandable compositions158US 6,207,085 B1Rectorseal Corporation · 2001