US3219488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced combination safety blow-out and gas permeable membrane for alkaline galvanic cells
Assignee: Union Carbide Corp
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Filing: 1961-12-15
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Granted: 1965-11-23
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Expires: 1981-12-15
Abstract
No abstract record available.
Inventors
- 👤 Jr James Southworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:59
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/147; H01M50/148; H01M50/154; H01M50/30; H01M50/394; H01M50/342; H01M50/3425; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A GALVANIC CELL COMPRISING A CUP-SHAPED CONTAINER AND A CELL CLOSURE SEALED IN THE OPEN END OF SAID CONTAINER, SAID CELL CLOSURE COMPRISING AN ANNULAR "U"-SHAPED SEAL GASKET COMPOSED OF A GAS PERMEABLE MATERIAL AND HAVING A CENTRAL APERTURE THEREIN, SAID SEAL GASKET HAVING AT LEAST ONE COMBINED SAFETY BLOW-OUT AND VENTING MEMBRANE CONSISTING OF AN INTEGRAL PORTION OF SAID GASKET THINNER THAN ADJACENT AREAS OF SAID GASKET, SAID MEMBRANE BEING SUFFICIENTLY THIN TO EFFECT A RUPTURE AT EXCESSIVE PRESSURES WITHIN SAID CELL; A RIGID ANNULAR COVER DISPOSED IN THE "U" OF SAID GASKET AND HAVING A VENTING APERTURE THEREIN; A YIELDABLE METALLIC WASHER DISPOSED BETWEEN SAID COVER AND SAID SEAL GASKET IN PROXIMATE SPACED RELATION WITH THE MAJOR PORTION OF SAID MEMBRANE, THEREBY STABILIZING THE RUPTURE PRESSURE OF SAID MEMBRANE; AND A RIVET EXTENDING THROUGH SAID CENTRAL APERATURE AND COMPRESSING SAID GASKET BETWEEN SAID COVER AND SAID RIVET.
Claim 2
Dependent Claim
149 words
A GALVANIC CELL COMPRISING A CUP-SHAPED CONTAINER AND A CELL CLOSURE SEALED IN THE OPEN END OF SAID CONTAINER, SAID CELL CLOSURE COMPRISING AN ANNULAR "U"-SHAPED SEAL GASKET COMPOSED OF A GAS PERMEABLE MATERIAL AND HAVING A CENTRAL APERTURE THEREIN, SAID SEAL GASKET HAVING AT LEAST ONE COMBINED SAFETY BLOW-OUT AND VENTING MEMBRANE CONSISTING OF AN INTEGRAL PORTION OF SAID GASKET THINNER THAN ADJACENT AREAS OF SAID GASKET, SAID MEMBRANE BEING SUFFICIENTLY THIN TO EFFECT A RUPTURE AT EXCESSIVE PRESSURES WITHIN SAID CELL; A RIGID ANNULAR COVER DISPOSED IN THE "U" OF SAID GASKET AND HAVING A VENTING APERTURE THEREIN; A YIELDABLE METALLIC WASHER DISPOSED BETWEEN SAID COVER AND SAID SEAL GASKET IN PROXIMATE SPACED RELATION WITH THE MAJOR PORTION OF SAID MEMBRANE, THEREBY STABILIZING THE RUPTURE PRESSURE OF SAID MEMBRANE; AND A RIVET EXTENDING THROUGH SAID CENTRAL APERATURE AND COMPRESSING SAID GASKET BETWEEN SAID COVER AND SAID RIVET.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |