C07C 251/30
Having nitrogen atoms of imino groups quaternised
Official title: having nitrogen atoms of imino groups quaternised
C07C251/30 (Having nitrogen atoms of imino groups quaternised) appears on 44 US grants and 48 published applications in this corpus.
Search patents in C07C- Granted patents
- 44
- Published applications
- 48
- Assignees
- 43
- Inventors
- 136
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 3 |
| 2009 | 1 | 5 |
| 2010 | 3 | 3 |
| 2011 | 2 | 3 |
| 2012 | 1 | 3 |
| 2013 | 3 | 1 |
| 2014 | 0 | 2 |
| 2015 | 5 | 2 |
| 2016 | 1 | 1 |
| 2017 | 3 | 3 |
| 2018 | 0 | 3 |
| 2019 | 2 | 2 |
| 2020 | 2 | 3 |
| 2021 | 1 | 2 |
| 2022 | 1 | 3 |
| 2023 | 2 | 3 |
| 2024 | 2 | 1 |
| 2025 | 0 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pigmented and fluorescent compounds derived from the addition of a primary or secondary amine to an aldehyde31 Mar 2026US 12,590,209 B2Regents of the University of Minnesota
- Tedizolid intermediate and efficient preparation method thereof3 Mar 2026US 12,565,482 B2Nanjing Chempion Biotechnology Co., Ltd.
- Compound, core-shell dye, photosensitive resin composition including the same, and color filter8 Oct 2024US 12,110,262 B2Samsung SDI.Co., Ltd.
- Compound, core-shell dye, photosensitive resin composition including the same, and color filter2 Apr 2024US 11,945,763 B2Samsung SDI.Co., Ltd.
- Compound and colored resin composition21 Feb 2023US 11,584,852 B2Sumitomo Chemical Company, Limited
- Triarylmethane Dyes7 Aug 2025US 2025/0250440 A1Kinnos Inc.
- Compound for optical absorbent19 Jun 2025US 2025/0197346 A1Lms Co., Ltd.
- Fluorogenic sensors for detecting antigens20 Jun 2024US 2024/0201179 A1President and Fellows of Harvard College
- Tedizolid intermediate and efficient preparation method thereof9 Feb 2023US 2023/0045135 A1Nanjing Chempion Biotechnology Co., Ltd.
- Chiral guanidines, salts thereof, methods of making chiral guanidines and salts thereof, and uses of chiral guanidines and salts thereof in the preparation of enantiomerically pure amino acids26 Jan 2023US 2023/0028700 A1
Most cited
By later US patents
- Squaraine dyes21US 4,830,786 ASyntex (U.S.A.) Inc. · 1989
- Quinone diimmonium salts and their use to cure epoxies19US 5,686,639 AEpolin, Inc. · 1997
- Process for synthesizing COX-2 inhibitors11US 6,040,319 AMerck & Co., Inc. · 2000
- Squaraine dye9US 5,039,818 ASyntex (U.S.A.) Inc. · 1991
- Squaraine dyes8US 5,310,922 ASyntex (U.S.A.) Inc. · 1994