C07C 2529/035
Crystalline silica polymorphs
Official title: Crystalline silica polymorphs, e.g. silicalites
C07C2529/035 (Crystalline silica polymorphs) appears on 95 US grants and 39 published applications in this corpus.
Search patents in C07C- Granted patents
- 95
- Published applications
- 39
- Assignees
- 44
- Inventors
- 183
- Latest grant
- 6 Dec 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 11 | 0 |
| 1984 | 5 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 0 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 3 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 4 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 2 | 4 |
| 2015 | 0 | 2 |
| 2016 | 0 | 3 |
| 2017 | 7 | 4 |
| 2018 | 2 | 4 |
| 2019 | 2 | 2 |
| 2020 | 4 | 4 |
| 2021 | 4 | 3 |
| 2022 | 3 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Catalyst for producing olefins from dehydrogenation of alkane and a method for producing olefins using said catalyst6 Dec 2022US 11,517,885 B2PTT Global Chemical Public Company Limited
- Catalyst, method for producing same, and method for producing diene compound using said catalyst11 Oct 2022US 11,465,128 B2Sekisui Chemical Co., Ltd.
- Multiple-stage catalyst system for self-metathesis with controlled isomerization and cracking8 Feb 2022US 11,242,297 B2Saudi Arabian Oil Company
- Catalyst system and process for conversion of a hydrocarbon feed utilizing the catalyst system5 Oct 2021US 11,135,574 B2SMH Co., Ltd
- Catalytic conversion of ethanol to 1-/2-butenes29 Jun 2021US 11,046,623 B1Battelle Memorial Institute
- Method for producing paraxylene27 Feb 2025US 2025/0066268 A1Chiyoda Corporation
- Aromatic compound manufacturing method10 Oct 2024US 2024/0336543 A1Chiyoda Corporation
- Core-shell composite catalyst, preparation method for same, and use thereof1 Feb 2024US 2024/0034697 A1
- Hollow zeolites catalysts for the production of alkl aromatic compounds from aromatic hydocarbons and olefins15 Jul 2021US 2021/0213435 A1Sabic Global Technologies B.V.
- Catalyst, method for producing same, and method for producing diene compound using said catalyst10 Jun 2021US 2021/0170364 A1Sekisui Chemical Co., Ltd.
Most cited
By later US patents
- Crystalline silica and use in alkylation of aromatics82US 4,283,306 AE. I. Du Pont de Nemours and Company · 1981
- Catalytic conversion of oxygenates to olefins65US 6,046,373 AExxon Chemical Patents Inc. · 2000
- Methylation of toluene to para-xylene56US 5,994,603 AExxon Chemical Patents Inc. · 1999
- Oligomerization of liquid olefin over a nickel-containing silicaceous crystalline molecular sieve and hydrocarbyl aluminum halide52US 4,551,438 AChevron Research Company · 1985
- Hydrocarbon conversion catalyst43US 4,362,653 AUop LLC · 1982