A24D 3/02
Manufacture of tobacco smoke filters
A24D3/02 (Manufacture of tobacco smoke filters) appears on 729 US grants and 853 published applications in this corpus.
Search patents in A24D- Granted patents
- 729
- Published applications
- 853
- Assignees
- 158
- Inventors
- 1,290
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 28 | 0 |
| 1978 | 11 | 0 |
| 1979 | 9 | 0 |
| 1980 | 11 | 0 |
| 1981 | 19 | 0 |
| 1982 | 12 | 0 |
| 1983 | 12 | 0 |
| 1984 | 7 | 0 |
| 1985 | 20 | 0 |
| 1986 | 10 | 0 |
| 1987 | 12 | 0 |
| 1988 | 7 | 0 |
| 1989 | 10 | 0 |
| 1990 | 5 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 7 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 3 |
| 2002 | 3 | 5 |
| 2003 | 4 | 10 |
| 2004 | 6 | 25 |
| 2005 | 6 | 18 |
| 2006 | 5 | 21 |
| 2007 | 7 | 14 |
| 2008 | 5 | 24 |
| 2009 | 7 | 17 |
| 2010 | 12 | 19 |
| 2011 | 13 | 23 |
| 2012 | 16 | 34 |
| 2013 | 26 | 37 |
| 2014 | 14 | 52 |
| 2015 | 35 | 40 |
| 2016 | 22 | 39 |
| 2017 | 19 | 31 |
| 2018 | 26 | 33 |
| 2019 | 37 | 47 |
| 2020 | 30 | 55 |
| 2021 | 29 | 50 |
| 2022 | 35 | 39 |
| 2023 | 34 | 69 |
| 2024 | 42 | 60 |
| 2025 | 33 | 50 |
| 2026 | 25 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A24D 3/0204Preliminary operations before the filter rod forming process343
- A24D 3/0275For filters with special features233
- A24D 3/0229Filter rod forming processes174
- A24D 3/025Final operations, i.e. after the filter rod forming process100
- A24D 3/0295Process control means78
- A24D 3/027Multiple line manufacturing devices6
Recent patents
- Manufacture of gas emission medium for enhancing migration amount of active ingredients15 Sep 2026US 12,733,671 B2Kt&G Corporation
- Article for use in a non-combustible aerosol provision system25 Aug 2026US 12,714,138 B2Nicoventures Trading Limited
- Aerosol generating article and system25 Aug 2026US 12,714,139 B2Kt&G Corporation
- Article for use in an aerosol provision system18 Aug 2026US 12,708,138 B2Nicoventures Trading Limited
- Smoking article and method for a cigar or cigarillo using optional second filter and slidable sleeve11 Aug 2026US 12,702,152 B1IP Trademark Holdings, Inc.
- Aerosol-generating article with upstream section, hollow tubular element and ventilation10 Sep 2026US 2026/0262706 A1Philip Morris Products S. A.
- Manufacturing machine for rod used in flavor inhaler and manufacturing method for rod10 Sep 2026US 2026/0262709 A1Japan Tobacco Inc.
- Multi-filter device for hoffmann compounds in gaseous media10 Sep 2026US 2026/0262711 A1Compania Industrial De Tabacos Monte Paz S.A.
- Lyocell material, cigarette filter, and respective manufacturing methods therefor10 Sep 2026US 2026/0262712 A1Kolon Industries, Inc.
- Positioning of segments for aerosol-generating articles with a positioning wheel having adjustable receiving positions27 Aug 2026US 2026/0248171 A1Philip Morris Products S. A.
Most cited
By later US patents
- Production of tobacco smoke filters149US 4,281,671 AAmerican Filtrona Corporation · 1981
- Biodegradable polyvinyl alcohol tobacco smoke filters, tobacco smoke products incorporating such filters, and methods and apparatus for making same134US 5,911,224 AFiltrona International Limited · 1999
- Spunbond loop material for hook and loop fastening systems121US 5,669,900 AKimberly-Clark Worldwide, Inc. · 1997
- Process for making a carbon heat source and smoking article including the heat source and a flavor generator112US 5,060,676 APhilip Morris Incorporated · 1991
- Rods containing pelletized material109US 4,862,905 AR. J. Reynolds Tobacco Company · 1989