US5624260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delivery system for aqueous paste dental materials
Assignee: 3M Co
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Filing: 1994-02-28
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Granted: 1997-04-29
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Expires: 2014-02-28
Abstract
Abstract A cartridge for delivery of aqueous paste dental materials is provided, wherein the cartridge comprises a cartridge body made from an injection moldable material comprising polyolefin polymers. The cartridge body having a Moisture Permeability less than 25 g mil/m 2 day atm. and an Oxygen Permeability greater than 180 cm 3 mil/m 2 day atm. The cartridge body comprises at least one chamber adapted for holding and simultaneously dispensing an aqueous paste dental material. The cartridge has a polymerizable aqueous paste dental material contained within the chamber of the cartridge body, and the cartridge is specially adapted to be mounted in a hand-held ejector-type gun.
Inventors
- 👤 Malcolm W. Wilcox
- 👤 Thomas W. Martin
- 👤 Joan V. Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:32
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/005; B05C17/00503; B05C17/00506; B05C17/00509; A; A61; A61C; A61C5/00; A61C5/60; A61C5/62; A61C5/64; A61C9/00; A61C9/0026; B05C17/00516; B05C17/00553; B05C17/00596
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A cartridge for delivery of aqueous paste dental materials, said cartridge comprising a) a cartridge body made from an injection moldable material comprising a polymer selected from the group consisting of amorphous polyolefin polymers, said cartridge body having a Moisture Permeability less than or equal to about 0.16 g mil/m 2 day atm. and an Oxygen Permeability greater than or equal to about 3720 cm 3 mil/m 2 day atm., said cartridge body comprising at least one chamber adapted for holding an aqueous paste dental material and simultaneously dispensing same; and b) a polymerizable aqueous paste dental material contained within said at least one chamber of said cartridge body; wherein said cartridge is specially adapted to be mounted in a hand-held ejector-type gun.
Claim 2
Dependent Claim
123 words
A cartridge for delivery of aqueous paste dental materials, said cartridge comprising a) a cartridge body made from an injection moldable material comprising a polymer selected from the group consisting of amorphous polyolefin polymers, said cartridge body having a Moisture Permeability less than or equal to about 0.16 g mil/m 2 day atm. and an Oxygen Permeability greater than or equal to about 3720 cm 3 mil/m 2 day atm., said cartridge body comprising at least one chamber adapted for holding an aqueous paste dental material and simultaneously dispensing same; and b) a polymerizable aqueous paste dental material contained within said at least one chamber of said cartridge body; wherein said cartridge is specially adapted to be mounted in a hand-held ejector-type gun.
Claim 3
Dependent Claim
127 words
A cartridge for delivery of multiple-part dental materials, said cartridge comprising a) a cartridge body made from an injection moldable material comprising a polymer selected from the group consisting of amorphous polyolefin polymers, said cartridge body having a Moisture Permeability less than or equal to about 0.16 g mil/m 2 day atm. and an Oxygen Permeability greater than or equal to about 3720 cm 3 mil/m 2 day atm., said cartridge body comprising a plurality of separate chambers adapted for holding separate parts of a multiple-part dental material and simultaneously dispensing same; and b) a polymerizable aqueous paste dental material contained within at least one of said separate chambers of said cartridge body; wherein said cartridge is specially adapted to be mounted in a hand-held ejector-type gun.
Claim 4
Dependent Claim
127 words
A cartridge for delivery of multiple-part dental materials, said cartridge comprising a) a cartridge body made from an injection moldable material comprising a polymer selected from the group consisting of amorphous polyolefin polymers, said cartridge body having a Moisture Permeability less than or equal to about 0.16 g mil/m 2 day atm. and an Oxygen Permeability greater than or equal to about 3720 cm 3 mil/m 2 day atm., said cartridge body comprising a plurality of separate chambers adapted for holding separate parts of a multiple-part dental material and simultaneously dispensing same; and b) a polymerizable aqueous paste dental material contained within at least one of said separate chambers of said cartridge body; wherein said cartridge is specially adapted to be mounted in a hand-held ejector-type gun.
Claim 5
Dependent Claim
19 words
The cartridge of claim 2, wherein said aqueous paste dental material is a component of a glass ionomer cement.
Claim 6
Dependent Claim
32 words
The cartridge of claim 2, wherein said injection moldable material is a blend of a) an amorphous polyolefin polymer, and b) a second polymer that is compatible with the polymer of (a).
Claim 7
Dependent Claim
32 words
The cartridge of claim 1, wherein said injection moldable material is a blend of a) an amorphous polyolefin polymer, and b) a second polymer that is compatible with the polymer of (a).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-28 | 2000-10-28 | 2001-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-28 | 2004-10-28 | 2005-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-28 | 2008-10-28 | 2009-04-29 | $7700.00 | Window Closed / Lapsed |