C08F 4/48
Selected from lithium, rubidium, caesium or francium
Official title: selected from lithium, rubidium, caesium or francium {(C08F4/461 takes precedence)}
C08F4/48 (Selected from lithium, rubidium, caesium or francium) appears on 140 US grants and 98 published applications in this corpus.
Search patents in C08F- Granted patents
- 140
- Published applications
- 98
- Assignees
- 59
- Inventors
- 300
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 1 |
| 2003 | 6 | 8 |
| 2004 | 7 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 5 |
| 2007 | 0 | 2 |
| 2008 | 3 | 2 |
| 2009 | 1 | 4 |
| 2010 | 1 | 1 |
| 2011 | 3 | 1 |
| 2012 | 1 | 6 |
| 2013 | 1 | 6 |
| 2014 | 5 | 5 |
| 2015 | 8 | 5 |
| 2016 | 4 | 3 |
| 2017 | 2 | 4 |
| 2018 | 2 | 10 |
| 2019 | 7 | 8 |
| 2020 | 5 | 9 |
| 2021 | 10 | 9 |
| 2022 | 6 | 1 |
| 2023 | 2 | 3 |
| 2024 | 4 | 2 |
| 2025 | 3 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process and catalysts for hydrogen mediated anionic polymerization of conjugated dienes and liquid polymers thereof29 Sep 2026US 12,747,315 B2Albemarle Corporation
- Anionic polymerization initiator, anionic polymerization initiator composition, and production method therefor25 Nov 2025US 12,479,950 B2LG Chem.Ltd.
- Coating compositions containing (meth)acrylic resins having silane groups29 Apr 2025US 12,286,551 B2BASF Coatings GmbH
- Anionic polymerization process and polymer production method22 Apr 2025US 12,281,185 B2Kuraray Co., Ltd.
- Rubber composition and molded article manufactured therefrom17 Dec 2024US 12,168,710 B2LG Chem.Ltd.
- Method for preparation of alkyl poly(3-hydroxypropionate), alkyl poly(3-hydroxypropionate) and composition comprising the same18 Jun 2026US 2026/0167747 A1LG Chem.Ltd.
- Process and catalysts for hydrogen mediated anionic copolymerization of conjugated dienes and liquid copolymers thereof5 Jun 2025US 2025/0179233 A1Albemarle Corporation
- High Strength Hydrogenated Polymers, And Rubber Compositions Incorporating Same7 Nov 2024US 2024/0368325 A1Bridgestone Corporation
- Process and catalysts for hydrogen mediated anionic polymerization of conjugated dienes and liquid polymers thereof1 Feb 2024US 2024/0034825 A1Albemarle Corporation
- High Strength Hydrogenated Polymers, And Rubber Compositions Incorporating Same4 May 2023US 2023/0134110 A1Bridgestone Corporation
Most cited
By later US patents
- Preparation of hydroxy-terminated conjugated diene polymers127US 4,039,593 ALithium Corporation of America · 1977
- Tin containing elastomers and products having reduced hysteresis properties69US 5,268,439 ABridgestone/Firestone, Inc. · 1993
- Protected functional initiators for making terminally functionalized polymers69US 5,416,168 AShell Oil Company · 1995
- Aminoalkyllithium compounds containing cyclic amines and polymers therefrom65US 5,574,109 ABridgestone Corporation · 1996
- Protected functional initiators for making terminally functionalized polymers54US 5,391,663 AShell Oil Company · 1995