C04B 2103/46
Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
C04B2103/46 (Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents) appears on 261 US grants and 238 published applications in this corpus.
Search patents in C04B- Granted patents
- 261
- Published applications
- 238
- Assignees
- 119
- Inventors
- 551
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 7 | 0 |
| 1985 | 2 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 2 |
| 2002 | 3 | 0 |
| 2003 | 0 | 3 |
| 2004 | 5 | 5 |
| 2005 | 1 | 5 |
| 2006 | 4 | 6 |
| 2007 | 4 | 9 |
| 2008 | 4 | 8 |
| 2009 | 5 | 3 |
| 2010 | 9 | 9 |
| 2011 | 2 | 9 |
| 2012 | 2 | 7 |
| 2013 | 5 | 9 |
| 2014 | 4 | 4 |
| 2015 | 2 | 4 |
| 2016 | 6 | 9 |
| 2017 | 9 | 13 |
| 2018 | 9 | 41 |
| 2019 | 16 | 19 |
| 2020 | 23 | 22 |
| 2021 | 21 | 7 |
| 2022 | 13 | 10 |
| 2023 | 14 | 10 |
| 2024 | 9 | 9 |
| 2025 | 6 | 10 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Accelerating portland cement and sand mixtures with dry calcium chloride6 Oct 2026US 12,753,117 B1J&P Invesco LLC
- Building materials and components and methods of making the same4 Aug 2026US 12,698,237 B2University of Wyoming
- Building materials and components and methods of making the same2 Jun 2026US 12,643,824 B2
- Repairing wellbore cement structures and related compositions12 May 2026US 12,624,273 B2Saudi Arabian Oil Company
- Geopolymer compositions and methods24 Feb 2026US 12,559,662 B2Schlumberger Technology Corporation
- Cementitous compositions for reducing efflorescence8 Oct 2026US 2026/0308051 A1Tremco Cpg Inc.
- Building materials and components and methods of making the same10 Sep 2026US 2026/0265146 A1University of Wyoming
- Geopolymer compositions and methods2 Jul 2026US 2026/0184982 A1Schlumberger Technology Corporation
- Wellbore servicing compositions containing a latex additive12 Mar 2026US 2026/0071111 A1Halliburton Energy Services.Inc.
- System and method for natural-based construction material1 Jan 2026US 2026/0001811 A1
Most cited
By later US patents
- Method of reducing fluid loss in cement compositions which may contain substantial salt concentrations203US 4,676,317 AHalliburton Company · 1987
- Cementing composition and aqueous hydraulic cementing solution comprising water-soluble, nonionic hydrophobically modified hydroxyethyl cellulose106US 4,784,693 AAqualon Company · 1988
- Method of using thixotropic cements for combating gas migration problems103US 4,524,828 AHalliburton Company · 1985
- Method for control of fluid loss and gas migration in well cementing100US 5,988,279 AFritz Industries, Inc. · 1999
- Liquid fluid loss control additive for oil field cements94US 4,687,516 AHalliburton Company · 1987