Patent US3756571A successfully refreshed from Google Patents.
US3756571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing capsule in particular for dental preparation
Assignee: Individual
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Filing: 1971-10-29
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Granted: 1973-09-04
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Expires: 1991-10-29
Abstract
Abstract A mixing capsule for dental preparations where one of the components to be mixed is stored in an elongated mixing chamber and the other component or components are stored in separate compartments prior to mixing. The capsule comprises means for injecting the contents of the separate compartment or compartments in the mixing chamber to form a self-curing compound. The invention provides sealing means, which upon removal from the mixing capsule provide access to the mixing chamber along substantially the entire length thereof.
Inventors
- 👤 R Winberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:06
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/60; A61C5/66; Y; Y10; Y10S; Y10S366/00; Y10S366/602
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
A sealed capsule for the mixing of substances comprising in combination: a. a mixing receptacle having at least two separate compartments for containing dissimilar components that are reactive with one another; b. at least one of said separate compartments being a mixing compartment; c. at least one of said separate compartments having a volume less than that of said mixing compartment; d. a wall separating said compartments; e. means for expelling substantially all of the contents of said small volume compartment into said mixing compartment without causing a change in volume of said mixing compartment, said small volume compartment being resealed in relation to said mixing compartment after expulsion of the contents therein; and f. means for opening said mixing chamber along substantially its entire length after mixing of said reactive components.
Claim 2
Dependent Claim
132 words
A sealed capsule for the mixing of substances comprising in combination: a. a mixing receptacle having at least two separate compartments for containing dissimilar components that are reactive with one another; b. at least one of said separate compartments being a mixing compartment; c. at least one of said separate compartments having a volume less than that of said mixing compartment; d. a wall separating said compartments; e. means for expelling substantially all of the contents of said small volume compartment into said mixing compartment without causing a change in volume of said mixing compartment, said small volume compartment being resealed in relation to said mixing compartment after expulsion of the contents therein; and f. means for opening said mixing chamber along substantially its entire length after mixing of said reactive components.
Claim 3
Dependent Claim
19 words
A sealed capsule as defined in claim 1 wherein said small volume compartment includes a slidably mounted plunger means.
Claim 4
Dependent Claim
45 words
A sealed capsule as defined in claim 2 wherein movement of said slidably mounted plunger means in said small volume chamber causes rupture of said wall separating said reactive components expelling substantially all of the contents of said small volume compartment into said mixing compartment.
Claim 5
Dependent Claim
26 words
A sealed capsule as defined in claim 1 wherein said plunger includes an inner short slidably mounted plunger means and an outer long slidably mounted plunger.
Claim 6
Dependent Claim
29 words
A sealed capsule as defined in claim 4 wherein said wall separating said reactive components includes a channel, said channel being first sealed by said short slidably mounted punger.
Claim 7
Dependent Claim
55 words
A sealed capsule as defined in claim 5 wherein movement of said outer long slidably mounted plunger into said small volume compartment causes said inner short slidably mounted plunger to unseal said channel in said wall separating the reactive components expelling substantially all of the contents of said small volume compartment into said mixing compartment.
References Cited (Backward Citations)
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 |