C04B 24/20
Sulfonated aromatic compounds
C04B24/20 (Sulfonated aromatic compounds) appears on 159 US grants and 99 published applications in this corpus.
Search patents in C04B- Granted patents
- 159
- Published applications
- 99
- Assignees
- 105
- Inventors
- 471
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 9 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 6 | 0 |
| 1992 | 6 | 0 |
| 1993 | 8 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 4 |
| 2005 | 3 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 1 | 3 |
| 2012 | 2 | 2 |
| 2013 | 1 | 3 |
| 2014 | 1 | 2 |
| 2015 | 3 | 7 |
| 2016 | 2 | 7 |
| 2017 | 3 | 10 |
| 2018 | 4 | 8 |
| 2019 | 8 | 10 |
| 2020 | 8 | 3 |
| 2021 | 5 | 4 |
| 2022 | 2 | 4 |
| 2023 | 2 | 8 |
| 2024 | 5 | 9 |
| 2025 | 5 | 4 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Foamed liquefiers in gypsum boards8 Sep 2026US 12,729,165 B2Knauf Gips KG
- Use of a naphthalenesulfonic acid polycondensate as a plasticizer in a construction composition and construction composition4 Aug 2026US 12,698,235 B2Construction Research & Technology GmbH
- Dry mixes and cements containing cellulose ethers as lubricative additives for roller compacted concrete applications and methods of using them17 Mar 2026US 12,577,159 B2Dow Global Technologies LLC
- Compositions and methods for well cementing17 Mar 2026US 12,577,449 B2Schlumberger Technology Corporation
- Method for preparing heat-conductive cement slurry for well cementation30 Dec 2025US 12,509,621 B2Southwest Petroleum University
- Composition for adjusting of air pores in building products in the presence of sulfate-based superplasticizers1 Oct 2026US 2026/0296976 A1BASF SE
- Compositions and methods for well cementing23 Jul 2026US 2026/0209594 A1Schlumberger Technology Corporation
- Cement free self-leveling materials18 Dec 2025US 2025/0382229 A1Laticrete International, Inc.
- Compositions and methods for well cementing2 Oct 2025US 2025/0304847 A1Schlumberger Technology Corporation
- Cementitious hematite-based geopolymer composition10 Jul 2025US 2025/0223229 A1King Fahd University of Petroleum and Minerals
Most cited
By later US patents
- Squeeze cementing133US 5,238,064 AHalliburton Company · 1993
- Dispersant and foaming agent combination61US 6,774,146 B2GEO Specialty Chemicals, Inc. · 2004
- Method and a composition for preparing a shaped article56US 4,999,056 ADensit A/S Rordalsuej · 1991
- Cement compositions for cementing of wells enabling gas channelling in the cemented annulus to be inhibited by right-angle setting53US 4,767,460 ADowell Schlumberger Incorporated · 1988
- High starch light weight gypsum wallboard53US 7,731,794 B2United States Gypsum Company · 2010