C04B 2235/448
Sulphates or sulphites
C04B2235/448 (Sulphates or sulphites) appears on 146 US grants and 178 published applications in this corpus.
Search patents in C04B- Granted patents
- 146
- Published applications
- 178
- Assignees
- 148
- Inventors
- 501
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 1 |
| 2004 | 3 | 8 |
| 2005 | 2 | 2 |
| 2006 | 5 | 10 |
| 2007 | 3 | 1 |
| 2008 | 0 | 7 |
| 2009 | 5 | 6 |
| 2010 | 2 | 10 |
| 2011 | 3 | 11 |
| 2012 | 6 | 10 |
| 2013 | 6 | 6 |
| 2014 | 10 | 5 |
| 2015 | 2 | 4 |
| 2016 | 8 | 9 |
| 2017 | 7 | 9 |
| 2018 | 4 | 9 |
| 2019 | 8 | 15 |
| 2020 | 10 | 9 |
| 2021 | 7 | 11 |
| 2022 | 6 | 8 |
| 2023 | 4 | 9 |
| 2024 | 9 | 10 |
| 2025 | 8 | 5 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ceramic article, semiconductor apparatus for manufacturing a semiconductor structure and method of manufacturing a ceramic article25 Aug 2026US 12,715,816 B2Taiwan Semiconductor Manufacturing Company.Ltd
- Moisture regulating material and production method thereof7 Jul 2026US 12,673,899 B2
- Method of carbon mineralization19 May 2026US 12,630,478 B1King Fahd University of Petroleum and Minerals
- Barium compound structure and manufacturing method therefor7 Apr 2026US 12,595,187 B2Panasonic Intellectual Property Management Co., Ltd.
- Ceramic slate with colored jade effect and preparation method thereof24 Mar 2026US 12,583,793 B2Monalisa Group Co., Ltd
- Room-temperature and ambient-pressure superconducting ceramic and methods for producing the same30 Apr 2026US 2026/0120913 A1Quantum Energy Research Centre (Q-Centre)
- Unshaped refractory material, method of producing a moist unshaped refractory material and method of making a refractory lining12 Mar 2026US 2026/0070847 A1Refractory Intellectual Property GmbH & Co.KG
- Method of masking a dental support structure of a dental prosthesis made of highly translucent ceramic material14 Aug 2025US 2025/0255783 A1James R. Glidewell Dental Ceramics, Inc.
- Room-temperature and ambient-pressure superconducting ceramic and methods for producing the same7 Aug 2025US 2025/0250170 A1
- Continuous ceramic fiber, method for producing the same, and ceramic matrix composite containing the continuous ceramic fiber12 Jun 2025US 2025/0187991 A1Tosoh Corporation
Most cited
By later US patents
- Polycrystalline diamond compact (PDC) cutting element having multiple catalytic elements156US 7,635,035 B1US Synthetic Corporation · 2009
- Non-frangible alumina-silica fibers117US 4,047,965 AMinnesota Mining and Manufacturing Company · 1977
- Lustrous black interference pigments100US 7,303,622 B2Merck Patent GmbH · 2007
- Polycrystalline diamond compact including a pre-sintered polycrystalline diamond table including a nonmetallic catalyst that limits infiltration of a metallic-catalyst infiltrant therein and applications therefor50US 9,103,172 B1US Synthetic Corporation · 2015
- Ceramic-ceramic composite material and production method42US 4,888,311 A1989