US3756386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-chamber container
Assignee: Individual
•
Filing: 1970-11-23
•
Granted: 1973-09-04
•
Expires: 1990-11-23
Abstract
Abstract A multi-chamber container for separately accommodating reacting materials which, when mixed, are ready for use as dental preparations. The container has an open-ended thin walled body which is covered by a tear foil and which forms in conjunction with a marginal extension of the main container body, one or more secondary chambers, from which liquid or paste mixtures can be pressed into the main chamber by destroying a separating diaphragm or seam.
Inventors
- 👤 V Marckardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:47
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/60; A61C5/66
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
146 words
A multi-chamber container separately accommodating two or more substances which react with each other, for use in the preparation of ready-to-use dental material, the container comprising: a substantially stiff container body having an upwardly extending depression constituting the primary chamber containing one said substance, and a generally horizontally disposed flange completely surrounding and extending outwardly from the border or edge of said primary chamber; a strippable flexible foil overlying said chamber and overlying and adhering to the bottom surface of said flange and completely to said border thereof, a depression in said flexible foil constituting a secondary chamber having a significantly smaller volume than said primary chamber and containing a second substance, said secondary chamber being defined by a spacing between a predetermined surface of said flange located at least in part substantially immediately adjacent to said border of said primary chamber and said flexible foil.
Claim 2
Dependent Claim
146 words
A multi-chamber container separately accommodating two or more substances which react with each other, for use in the preparation of ready-to-use dental material, the container comprising: a substantially stiff container body having an upwardly extending depression constituting the primary chamber containing one said substance, and a generally horizontally disposed flange completely surrounding and extending outwardly from the border or edge of said primary chamber; a strippable flexible foil overlying said chamber and overlying and adhering to the bottom surface of said flange and completely to said border thereof, a depression in said flexible foil constituting a secondary chamber having a significantly smaller volume than said primary chamber and containing a second substance, said secondary chamber being defined by a spacing between a predetermined surface of said flange located at least in part substantially immediately adjacent to said border of said primary chamber and said flexible foil.
Claim 3
Dependent Claim
22 words
A multi-chamber container according to claim 1 wherein said secondary chamber is located contiguous to but lengthwise offset from said main chamber.
Claim 4
Dependent Claim
21 words
A multi-chamber container according to claim 1, in which said body and said primary chamber are elongated in an axial direction.
Claim 5
Dependent Claim
24 words
A multi-chamber container according to claim 3, wherein said predetermined surface area of said flange is located at one axial end of said body.
Claim 6
Dependent Claim
31 words
A multi-chamber container according to claim 4, wherein said flanged axial end establishing said predetermined surface area is folded about 90* to the plane of the opening of said primary chamber.
Claim 7
Dependent Claim
24 words
A multi-chamber container according to claim 1, in which said flexible foil is composed of an acid-resisting inner foil and a reinforcing cover foil.
Claim 8
Dependent Claim
42 words
A multi-chamber container according to claim 1, wherein the adherence of said flexible foil to said flange in the region between said secondary and primary chamber is rupturable, for emptying the substance of the secondary chamber into that of the primary chamber.
References Cited (Backward Citations)
US2771724A
Cited
US3054679A
Cited
US3266625A
Cited
US3548562A
Cited
US3651932A
Cited
US3635376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |