B65D 81/325
Containers having parallel or coaxial compartments, provided with a piston or a
Official title: {Containers having parallel or coaxial compartments, provided with a piston or a movable bottom for discharging contents}
B65D81/325 (Containers having parallel or coaxial compartments, provided with a piston or a) appears on 314 US grants and 246 published applications in this corpus.
Search patents in B65D- Granted patents
- 314
- Published applications
- 246
- Assignees
- 149
- Inventors
- 503
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 9 | 0 |
| 1992 | 3 | 0 |
| 1993 | 9 | 0 |
| 1994 | 15 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 8 | 0 |
| 1998 | 3 | 0 |
| 1999 | 16 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 1 |
| 2002 | 6 | 8 |
| 2003 | 5 | 5 |
| 2004 | 6 | 5 |
| 2005 | 3 | 9 |
| 2006 | 0 | 14 |
| 2007 | 5 | 10 |
| 2008 | 3 | 11 |
| 2009 | 4 | 7 |
| 2010 | 7 | 9 |
| 2011 | 9 | 11 |
| 2012 | 6 | 10 |
| 2013 | 7 | 13 |
| 2014 | 10 | 21 |
| 2015 | 7 | 10 |
| 2016 | 15 | 8 |
| 2017 | 11 | 17 |
| 2018 | 13 | 12 |
| 2019 | 15 | 12 |
| 2020 | 12 | 11 |
| 2021 | 11 | 11 |
| 2022 | 6 | 11 |
| 2023 | 10 | 7 |
| 2024 | 10 | 6 |
| 2025 | 5 | 5 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mixing and dispensing curable multi-component materials24 Feb 2026US 12,558,659 B23M Innovative Properties Company
- Impression material cartridge gasket having air vent hole formed therein20 Jan 2026US 12,529,425 B2
- Cartridge system for delivering an aqueous solution4 Nov 2025US 12,459,726 B2Gaplast GmbH
- Device for mixing and dispensing a personalized toothpaste19 Aug 2025US 12,391,455 B1
- Multi-chamber cartridge29 Jul 2025US 12,370,571 B2fischerwerke GmbH & Co. KG
- Retrofitted bottle assembly1 Oct 2026US 2026/0296761 A1
- Receiving container for a two-component or multi-component cartridge and two-component or multi-component cartridge21 May 2026US 2026/0138806 A1Ritter GmbH
- Impression material cartridge gasket having air vent hole formed therein28 Aug 2025US 2025/0271063 A1
- Cartridge assembly for insertion into a dispenser and dispenser for dispensing materials22 May 2025US 2025/0161974 A1Medmix Switzerland AG
- Pumping tumbler for preparing beverage and additive capsule therefor3 Apr 2025US 2025/0107647 A1
Most cited
By later US patents
- Static mixing device351US 4,538,920 AMinnesota Mining and Manufacturing Company · 1985
- Dental preparation, article and method for storage and delivery thereof280US 4,687,663 A1987
- Packaging and dispensing kit252US 4,040,420 AGeneral Dynamics Corporation · 1977
- Reusable pharmaceutical dispenser with full stroke indicator235US 5,271,527 AHabley Medical Technology Corporation · 1993
- Dispensing mixer for the storage and mixing of separate materials203US 4,753,536 A1988