C11D 3/28
Heterocyclic compounds containing nitrogen in the ring
C11D3/28 (Heterocyclic compounds containing nitrogen in the ring) appears on 520 US grants and 534 published applications in this corpus.
Search patents in C11D- Granted patents
- 520
- Published applications
- 534
- Assignees
- 236
- Inventors
- 1,446
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 8 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 11 | 0 |
| 1996 | 8 | 0 |
| 1997 | 11 | 0 |
| 1998 | 29 | 0 |
| 1999 | 32 | 0 |
| 2000 | 23 | 0 |
| 2001 | 12 | 3 |
| 2002 | 22 | 15 |
| 2003 | 14 | 18 |
| 2004 | 12 | 17 |
| 2005 | 6 | 22 |
| 2006 | 9 | 21 |
| 2007 | 8 | 20 |
| 2008 | 12 | 17 |
| 2009 | 12 | 14 |
| 2010 | 10 | 22 |
| 2011 | 5 | 9 |
| 2012 | 11 | 17 |
| 2013 | 14 | 16 |
| 2014 | 20 | 18 |
| 2015 | 9 | 24 |
| 2016 | 16 | 28 |
| 2017 | 17 | 25 |
| 2018 | 16 | 23 |
| 2019 | 18 | 24 |
| 2020 | 17 | 26 |
| 2021 | 15 | 25 |
| 2022 | 13 | 34 |
| 2023 | 20 | 20 |
| 2024 | 20 | 27 |
| 2025 | 15 | 23 |
| 2026 | 15 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing treatment liquid4 Aug 2026US 12,698,454 B2FUJIFILM Corporation
- Composition and process for selectively etching a hard mask and/or an etch-stop layer in the presence of layers of low-k materials, copper, cobalt and/or tungsten31 Mar 2026US 12,590,274 B2BASF SE
- Surface treatment composition, surface treatment method, and method for producing semiconductor substrate24 Mar 2026US 12,584,083 B2Fujimi Incorporated
- Post-CMP cleaning liquid comprising a substituted benzene anticorrosive agent, chelant, and amine compound24 Mar 2026US 12,588,450 B2FUJIFILM Corporation
- Granules comprising protonated triazacyclic compounds and bleaching agent and cleaning agent comprising the same17 Mar 2026US 12,577,505 B2Catexel Limited
- Surfactant Potentiators for Ethoxylated Surfactants1 Oct 2026US 2026/0297459 A1Arxada AG
- Fluorescent whitening agents24 Sep 2026US 2026/0286252 A1Thomas Swan & Co. Ltd.
- Treatment liquid, cleaning method for object to be treated, and manufacturing method of electronic device13 Aug 2026US 2026/0234507 A1FUJIFILM Corporation
- Granular laundry compositions containing dipicolinic acid and methods of making thereof30 Jul 2026US 2026/0218092 A1The Procter & Gamble Company
- Water-soluble automatic dishwashing detergent pouch23 Jul 2026US 2026/0209637 A1The Procter & Gamble Company
Most cited
By later US patents
- Color-safe bleach boosters, compositions and laundry methods employing same86US 5,817,614 AThe Procter & Gamble Company · 1998
- Polymer compositions having specified PH for improved dispensing and improved stability of wrinkle reducing compositions and methods of use80US 6,491,840 B1The Procter & Gamble Company · 2002
- Compositions comprising glycacarbamate and glycaurea compounds74US 5,880,076 ALever Brothers Company, Division of Conopco, Inc. · 1999
- Surface active lactams72US 5,294,644 AISP Investments Inc. · 1994
- Dryer-added fabric treatment article of manufacture containing antioxidant and sunscreen compounds for sun fade protection of fabrics68US 5,474,691 AThe Procter & Gamble Company · 1995