C01B 33/28
Base exchange silicates
Official title: {Base exchange silicates, e.g. zeolites (regeneration B01J49/00)}
C01B33/28 (Base exchange silicates) appears on 315 US grants and 31 published applications in this corpus.
Search patents in C01B- Granted patents
- 315
- Published applications
- 31
- Assignees
- 129
- Inventors
- 450
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 12 | 0 |
| 1978 | 12 | 0 |
| 1979 | 9 | 0 |
| 1980 | 14 | 0 |
| 1981 | 24 | 0 |
| 1982 | 16 | 0 |
| 1983 | 21 | 0 |
| 1984 | 10 | 0 |
| 1985 | 20 | 0 |
| 1986 | 17 | 0 |
| 1987 | 23 | 0 |
| 1988 | 8 | 0 |
| 1989 | 25 | 0 |
| 1990 | 14 | 0 |
| 1991 | 8 | 0 |
| 1992 | 20 | 0 |
| 1993 | 15 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 2 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 4 |
| 2019 | 2 | 2 |
| 2020 | 2 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 5 |
| 2023 | 2 | 5 |
| 2024 | 0 | 2 |
| 2025 | 3 | 3 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Molecular sieve SSZ-113 with high acidity, its synthesis and use2 Jun 2026US 12,643,796 B2Chevron U. S. A. Inc.
- Molecular sieve SSZ-121 with high acidity, its synthesis and use12 May 2026US 12,623,909 B2Chevron U. S. A. Inc.
- Molecular sieve boron SSZ-117x28 Apr 2026US 12,612,311 B2Chevron U. S. A. Inc.
- Methods for synthesis of hierarchically ordered crystalline microporous materials with long-range mesoporous order14 Apr 2026US 12,600,736 B2King Abdullah University of Science and Technology
- Method for producing relating to industrial mass production of high-purity artificial zeolite13 Jan 2026US 12,522,507 B2
- Molecular sieve ssz-113 with high acidity, its synthesis and use13 Aug 2026US 2026/0234008 A1Chevron U.S.A.Inc.
- Molecular sieve ssz-121 with high acidity, its synthesis and use13 Aug 2026US 2026/0234009 A1Chevron U.S.A.Inc.
- Methods for making zeolite-y particles23 Oct 2025US 2025/0326651 A1Saudi Arabian Oil Company
- Zeolite, method for producing zeolite, composition, liquid sealing agent, resin composite material, sealing material, method for producing sealing material, and electronic device13 Feb 2025US 2025/0051592 A1Mitsubishi Chemical Corporation
- Synthesis of mfi framework type zeolites16 Jan 2025US 2025/0019250 A1Chevron U.S.A.Inc.
Most cited
By later US patents
- Zeolite SSZ-25272US 4,826,667 AChevron Research Company · 1989
- Alkylation using zeolite SSZ-2579US 5,149,894 AChevron Research and Technology Company · 1992
- Zeolite ZSM-5777US 4,873,067 AMobil Oil Corporation · 1989
- Crystalline silicates and process of preparation66US 4,208,305 AShell Oil Company · 1980
- Silicoaluminophosphate crystallization using hydrolysis65US 4,673,559 AMobil Oil Corporation · 1987