C04B 24/2676
Polystyrenes
Official title: {Polystyrenes}
C04B24/2676 (Polystyrenes) appears on 91 US grants and 92 published applications in this corpus.
Search patents in C04B- Granted patents
- 91
- Published applications
- 92
- Assignees
- 51
- Inventors
- 293
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 6 | 4 |
| 2004 | 4 | 3 |
| 2005 | 3 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 3 |
| 2008 | 0 | 2 |
| 2009 | 3 | 0 |
| 2010 | 0 | 4 |
| 2011 | 2 | 3 |
| 2012 | 1 | 2 |
| 2013 | 2 | 3 |
| 2014 | 1 | 2 |
| 2015 | 7 | 4 |
| 2016 | 5 | 2 |
| 2017 | 3 | 7 |
| 2018 | 1 | 6 |
| 2019 | 3 | 5 |
| 2020 | 5 | 8 |
| 2021 | 7 | 6 |
| 2022 | 4 | 13 |
| 2023 | 5 | 2 |
| 2024 | 3 | 3 |
| 2025 | 3 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for preparing foamed polymer-modified bitumen compositions14 Apr 2026US 12,600,671 B2BASF SE
- Polymer-based latex for cementing fluids10 Mar 2026US 12,570,889 B2Saudi Arabian Oil Company
- Composition, preparation method for and application of composition, and self-healing method for well cementing in oil/gas field4 Nov 2025US 12,460,121 B2China Petroleum & Chemical Corporation
- Cement compositions and methods of preparation thereof17 Jun 2025US 12,331,243 B2Kraton Corporation
- Hydrocarbon swelling particles for wellbore cementing29 Apr 2025US 12,286,586 B2Synthomer Inc.
- Fluid loss control for geopolymer system30 Jul 2026US 2026/0218035 A1Schlumberger Technology Corporation
- Polymer-based latex for cementing fluids9 Oct 2025US 2025/0313743 A1Saudi Arabian Oil Company
- Coated structural elements for construction31 Jul 2025US 2025/0243116 A1Shaked Additives Ltd.
- Hydrocarbon swelling particles for wellbore cementing19 Jun 2025US 2025/0197712 A1Synthomer Inc.
- Method for producing lamination molded article, heat-sensitive gelling agent, and lamination molding composition22 May 2025US 2025/0162945 A1
Most cited
By later US patents
- Cement compositions for cementing wells, allowing pressure gas-channeling in the cemented annulus to be controlled111US 4,537,918 AEtudes et Fabrication Dowell Schlumberger · 1985
- Composition for a lightweight cement slurry for cementing oil and gas wells96US 4,721,160 ADowell Schlumberger Incorporated · 1988
- Methods of sealing expandable pipe in well bores and sealing compositions92US 6,722,433 B2Halliburton Energy Services.Inc. · 2004
- Stable well cementing methods and compositions74US 6,516,884 B1Halliburton Energy Services.Inc. · 2003
- Lightweight gypsum composition71US 6,171,388 B2Rhodia Inc. · 2001