C09C 1/021
Calcium carbonates
Official title: {Calcium carbonates}
C09C1/021 (Calcium carbonates) appears on 578 US grants and 656 published applications in this corpus.
Search patents in C09C- Granted patents
- 578
- Published applications
- 656
- Assignees
- 210
- Inventors
- 1,012
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 10 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 12 | 0 |
| 1997 | 8 | 0 |
| 1998 | 9 | 0 |
| 1999 | 4 | 0 |
| 2000 | 8 | 0 |
| 2001 | 4 | 2 |
| 2002 | 4 | 8 |
| 2003 | 10 | 18 |
| 2004 | 13 | 20 |
| 2005 | 2 | 13 |
| 2006 | 6 | 14 |
| 2007 | 12 | 14 |
| 2008 | 9 | 19 |
| 2009 | 7 | 29 |
| 2010 | 9 | 36 |
| 2011 | 17 | 27 |
| 2012 | 15 | 39 |
| 2013 | 22 | 34 |
| 2014 | 20 | 48 |
| 2015 | 35 | 54 |
| 2016 | 33 | 29 |
| 2017 | 40 | 50 |
| 2018 | 34 | 40 |
| 2019 | 36 | 34 |
| 2020 | 33 | 28 |
| 2021 | 19 | 18 |
| 2022 | 30 | 25 |
| 2023 | 20 | 22 |
| 2024 | 10 | 15 |
| 2025 | 11 | 12 |
| 2026 | 12 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ultrafine surface-treated fillers for thin breathable films22 Sep 2026US 12,742,058 B2Omya International AG
- Methods of forming minerals using biomineralizing microorganisms and biomineralizing macroorganisms and compositions formed using same18 Aug 2026US 12,709,573 B2The Regents of the University of Colorado, a body corporate
- Reinforced fluoropolymer14 Jul 2026US 12,679,953 B2Omya International AG
- Process for producing nano precipitated calcium carbonate30 Jun 2026US 12,668,499 B2Omya International AG
- Process for producing a white UV-absorbing surface-reacted calcium carbonate doped with a titanium species, a white UV-absorbing surface-reacted calcium carbonate and use thereof16 Jun 2026US 12,655,299 B2Omya International AG
- Method for the production of free-flowing granules20 Aug 2026US 2026/0242610 A1Omya International AG
- Compositions, methods, and systems related to transformation of vaterite particles13 Aug 2026US 2026/0234055 A1Arelac, Inc.
- Methods for production of precipitated calcium carbonate (pcc) and pcc product2 Jul 2026US 2026/0184588 A1Specialty Minerals (Michigan) Inc.
- Calcium carbonate water slurry and method for producing calcium carbonate water slurry11 Jun 2026US 2026/0159695 A1Shiraishi Kogyo Kaisha, Ltd.
- Zinc oxide-functionalized calcium carbonate composite26 Mar 2026US 2026/0085191 A1Omya International AG
Most cited
By later US patents
- Surface modified calcium carbonate composition and uses therefor97US 5,531,821 AECC International Limited · 1996
- Precipitated calcium carbonate-cationic starch binder as retention aid system for papermaking86US 4,892,590 APfizer Inc. · 1990
- Acid-stabilized calcium carbonate, process for its production and method for its use in the manufacture of acidic paper57US 5,043,017 APfizer Inc. · 1991
- Method for preparing hollow silica particles57US 6,221,326 B1Rhodia Chimie · 2001
- Filler for degradable plastics and process for producing the same54US 5,264,030 ANittetsu Mining Co., Ltd. · 1993