US2812377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat dry cell
Assignee: Union Carbide Corp
•
Filing: 1955-11-23
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Granted: 1957-11-05
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Expires: 1975-11-23
Abstract
No abstract record available.
Inventors
- 👤 John V Franquemont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:37
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/102; H01M50/109; H01M50/50; H01M50/543; H01M50/552; H01M50/559; H01M50/56; H01M6/00; H01M6/04; H01M6/06; H01M6/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A SUBSTANTIALLY FLAT DRY PRIMARY CELL COMPRISING AS ELEMENTS THEREOF A CONSUMABLE METAL ANODE; A SEPARATOR HAVING A BIBULOUS, ANODE-CONTACTING PORTION; AND A DEPOLARIZER MIX-CAKE WET WITH ELECTROLYTE, THE PERIPHERAL EDGES OF SAID MIX-CAKE AND THE SURFACE THEREOF ADJACENT TO SAID SEPARATOR BEING COVERED WITH A BIBULOUS PAPER BLANKET; A RESILIENT INTEGUMENT OF ELECTRICALLY INSULATING MATERIAL ENVELOPING THE PERIPHERAL EDGES OF THE ENUMERATED CELL ELEMENTS; A CATHODE COLLECTOR COMPOSED OF A FLEXIBLE, ELECTRICALLY-CONDUCTIVE FILM MATERIAL IN CONTACT WITH THE SURFACE OF SAID MIX-CAKE OPPOSITE TO THAT COVERED BY SAID BLANKET; SAID INTEGUMENT HAVING IN-TURNED MARGINAL EDGES; SAID CATHODE COLLECTORBEING SECURED TO SAID INTEGUMENT, SAID INTEGUMENT AND SAID COLLECTOR THEREBY HOLDING SAID CELL ELEMENTS TOGETHER AS A UNIT; SAID UNIT
Claim 2
Dependent Claim
119 words
A SUBSTANTIALLY FLAT DRY PRIMARY CELL COMPRISING AS ELEMENTS THEREOF A CONSUMABLE METAL ANODE; A SEPARATOR HAVING A BIBULOUS, ANODE-CONTACTING PORTION; AND A DEPOLARIZER MIX-CAKE WET WITH ELECTROLYTE, THE PERIPHERAL EDGES OF SAID MIX-CAKE AND THE SURFACE THEREOF ADJACENT TO SAID SEPARATOR BEING COVERED WITH A BIBULOUS PAPER BLANKET; A RESILIENT INTEGUMENT OF ELECTRICALLY INSULATING MATERIAL ENVELOPING THE PERIPHERAL EDGES OF THE ENUMERATED CELL ELEMENTS; A CATHODE COLLECTOR COMPOSED OF A FLEXIBLE, ELECTRICALLY-CONDUCTIVE FILM MATERIAL IN CONTACT WITH THE SURFACE OF SAID MIX-CAKE OPPOSITE TO THAT COVERED BY SAID BLANKET; SAID INTEGUMENT HAVING IN-TURNED MARGINAL EDGES; SAID CATHODE COLLECTORBEING SECURED TO SAID INTEGUMENT, SAID INTEGUMENT AND SAID COLLECTOR THEREBY HOLDING SAID CELL ELEMENTS TOGETHER AS A UNIT; SAID UNIT
References Cited (Backward Citations)
US2593893A
Cited
US2591355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |