US3756390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-compartment aspirating disposable hypodermic syringe package
Assignee: Wyeth Holdings LLC
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Filing: 1972-03-07
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Granted: 1973-09-04
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Expires: 1992-03-07
Abstract
Abstract A two compartment aspirating disposable hypodermic syringe package consists of a rupturable partically pre-slit diaphragm having a fluorohalocarbon polymer film as a primary moistureproof barrier across and dividing the syringe barrel into a compartment containing a dry component and a compartment containing a liquid component which components are to be mixed at time of use. A slidable piston in the barrel, on application of pressure, ruptures the diaphragm, permits mixing of the two components, clearing of air, aspiration and injection of the contents as the piston passes over the ruptured remains of the diaphragm.
Inventors
- 👤 A Abbey
- 👤 R Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/28; A61M5/284; B; B65; B65D; B65D81/00; B65D81/32; B65D81/3255; A61M5/31; A61M2005/3103; A61M2005/3104; A61M5/285; A61M5/286
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
57 words
The package of claim 1 in which the barrel comprises two telescoping pieces, and the diaphragm is sealed across one end of one of the pieces, to provide a liquid tight seal of the diaphragm to the one such piece, and in telescoping, mechanical stress on the barrel is transferred without stress or strain on the diaphragm.
Claim 2
Dependent Claim
30 words
The package of claim 2 in which the front compartment barrel has a shoulder and enlarged rear portion to concentrically receive and retain the liquid compartment in hermetically sealed relationship.
Claim 3
Dependent Claim
19 words
The package of claim 3 in which the diaphragm is sealed liquid-tight to both the front and rear compartments.
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 |