A24D 3/0291
For hollow tipped filters
Official title: {for hollow tipped filters, e.g. recess filters}
A24D3/0291 (For hollow tipped filters) appears on 26 US grants and 37 published applications in this corpus.
Search patents in A24D- Granted patents
- 26
- Published applications
- 37
- Assignees
- 13
- Inventors
- 69
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 4 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 5 |
| 2019 | 2 | 4 |
| 2020 | 1 | 5 |
| 2021 | 5 | 4 |
| 2022 | 2 | 3 |
| 2023 | 3 | 3 |
| 2024 | 5 | 5 |
| 2025 | 2 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device for filtering smoke17 Mar 2026US 12,575,600 B2
- Shaping a tobacco industry product10 Feb 2026US 12,543,779 B2British American Tobacco (Investments) Limited
- Die, die assembly, equipment and method for forming rods of fibrous material25 Nov 2025US 12,479,174 B2British American Tobacco (Investments) Limited
- Aerosol-generating article with narrow hollow tubular filter18 Feb 2025US 12,225,930 B2Philip Morris Products S. A.
- Methods and equipment for forming tubes of fibrous material9 Jul 2024US 12,030,264 B2British American Tobacco (Investments) Limited
- Aerosol-generating article assembly on a conveyor with a spacer6 Nov 2025US 2025/0338887 A1Philip Morris Products S. A.
- Smoking Substitute Consumable7 Nov 2024US 2024/0365851 A1Imperial Tobacco Limited
- Method and apparatus for pre-roll papers or wrap with tips31 Oct 2024US 2024/0358067 A1
- Inspection device and inspection method for filter12 Sep 2024US 2024/0302288 A1Japan Tobacco Inc.
- Device and method for moving tubular bodies5 Sep 2024US 2024/0292882 A1G. D S.p.A.
Most cited
By later US patents
- Apparatus for making composite filter plugs26US 4,044,659 AHauni-Werke Korber & Co. KG · 1977
- Smoking article with mouth end cavity15US 10,357,057 B2Philip Morris Products S. A. · 2019
- Tobacco smoke filter12US 9,872,517 B2Essentra Filter Products Development Co. Pte. Ltd. · 2018
- Machine for making recessed composite filter mouthpieces3US 4,237,778 AHauni-Werke Korber & Co. KG · 1980
- Method of forming smoking articles with mouth end cavities1US 10,123,561 B2Philip Morris Products S. A. · 2018