US3218197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined safety blow-out and gas permeable membrane for galvanic cells
Assignee: Union Carbide Corp
•
Filing: 1963-09-20
•
Granted: 1965-11-16
•
Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
- 👤 Carmichael Robert
- 👤 William A Vulpio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:36
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/394; H01M50/50; H01M50/543; H01M50/552; H01M50/559; H01M50/56; H01M50/10; H01M50/147; H01M50/148; H01M50/154; H01M50/342; H01M50/3425; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A GALVANIC CELL HAVING A CUP-SHAPED CONTAINER AND SEALED IN THE OPEN END OF SAID CONTAINER A CELL CLOSURE COMPRISING AN ANNULAR U-SHAPED SEAL GASKET HAVING A CENTRAL APERATURE THEREIN, A RIGID ANNULAR COVER DISPOSED IN THE U OF SAID GASKET AND HAVING A VENTING APERTURE THEREIN, AND A RIVET EXTENDING THROUGH SAID CENTRAL APERTURE AND COMPRESSING SAID GASKET BETWEEN SAID COVER AND SAID RIVET; THE IMPROVEMENT WHEREIN SAID SEAL GASKET IS COMPOSED OF A GAS PERMEABLE MATERIAL RESISTANT TO COLD FLOW AND WHEREIN SAID SEAL GASKET HAS AT LEAST ONE COMBINED SAFETY BLOW-OUT AND VENTING MEMBRANCE 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.
Claim 2
Dependent Claim
128 words
IN A GALVANIC CELL HAVING A CUP-SHAPED CONTAINER AND SEALED IN THE OPEN END OF SAID CONTAINER A CELL CLOSURE COMPRISING AN ANNULAR U-SHAPED SEAL GASKET HAVING A CENTRAL APERATURE THEREIN, A RIGID ANNULAR COVER DISPOSED IN THE U OF SAID GASKET AND HAVING A VENTING APERTURE THEREIN, AND A RIVET EXTENDING THROUGH SAID CENTRAL APERTURE AND COMPRESSING SAID GASKET BETWEEN SAID COVER AND SAID RIVET; THE IMPROVEMENT WHEREIN SAID SEAL GASKET IS COMPOSED OF A GAS PERMEABLE MATERIAL RESISTANT TO COLD FLOW AND WHEREIN SAID SEAL GASKET HAS AT LEAST ONE COMBINED SAFETY BLOW-OUT AND VENTING MEMBRANCE 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.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |