C08J 9/18
By impregnating polymer particles with the blowing agent
Official title: by impregnating polymer particles with the blowing agent
C08J9/18 (By impregnating polymer particles with the blowing agent) appears on 504 US grants and 499 published applications in this corpus.
Search patents in C08J- Granted patents
- 504
- Published applications
- 499
- Assignees
- 182
- Inventors
- 993
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 8 | 0 |
| 1986 | 12 | 0 |
| 1987 | 19 | 0 |
| 1988 | 16 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 8 | 0 |
| 1995 | 9 | 0 |
| 1996 | 13 | 0 |
| 1997 | 10 | 0 |
| 1998 | 6 | 0 |
| 1999 | 8 | 0 |
| 2000 | 13 | 0 |
| 2001 | 11 | 1 |
| 2002 | 8 | 7 |
| 2003 | 13 | 6 |
| 2004 | 5 | 3 |
| 2005 | 2 | 1 |
| 2006 | 0 | 8 |
| 2007 | 1 | 2 |
| 2008 | 1 | 3 |
| 2009 | 4 | 15 |
| 2010 | 5 | 11 |
| 2011 | 8 | 4 |
| 2012 | 4 | 20 |
| 2013 | 8 | 19 |
| 2014 | 9 | 20 |
| 2015 | 17 | 14 |
| 2016 | 15 | 31 |
| 2017 | 7 | 28 |
| 2018 | 18 | 30 |
| 2019 | 25 | 40 |
| 2020 | 18 | 30 |
| 2021 | 24 | 31 |
| 2022 | 20 | 35 |
| 2023 | 18 | 33 |
| 2024 | 18 | 50 |
| 2025 | 23 | 28 |
| 2026 | 26 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method for producing re-expandable polycarbonate beads, and corresponding polycarbonate beads17 Sep 2026US 2026/0275064 A1Covestro Deutschland AG
- Method for producing polycarbonate beads17 Sep 2026US 2026/0275065 A1Covestro Deutschland AG
Most cited
By later US patents
- Process for producing expandable thermoplastic resin beads107US 4,303,756 ASekisui Kaseihin Kogyo Kabushiki Kaisha · 1981
- Open pore biodegradable matrices88US 6,281,256 B1The Regents of the University of Michigan · 2001
- Process for producing expandable thermoplastic resin beads using polypropylene as nucleus84US 4,303,757 ASekisui Kaseihin Kogyo Kabushiki Kaisha · 1981
- Pre-foamed particles of polypropylene resin and process for production thereof78US 4,379,859 AJapan Styrene Paper Corporation · 1983
- Process for producing prefoamed polymer particles78US 4,464,484 AJapan Styrene Paper Corporation · 1984