US3205097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline dry cell for medium low temperature operation
Assignee: Duracell Inc USA
•
Filing: 1964-05-12
•
Granted: 1965-09-07
•
Expires: 1984-05-12
Abstract
No abstract record available.
Inventors
- 👤 Richard R Chune
- 👤 Roger M Goodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/12; H01M50/00; H01M50/30; H01M50/317; H01M50/392; H01M6/00; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A PRIMARY CELL SUITABLE FOR LOW TEMPERATURE OPERATION COMPRISING A METAL CONTAINER, A PRESSED POWDER COMPACT IN THE BOTTOM OF SAID CONTAINER INCLUDING A DEPOLARIZING ELECTRODE, AN ANODE-SPACER STRUCTURE IN SAID CONTAINER COMPRISING A ROLL OF ZINC FOIL INTERLEAVED WITH ABSORBENT SHEET SPACER MATERIAL, THE EDGE OF SAID FOIL PROJECTING AT A FIRST END OF SAID ROLL AND SPACER MATERIAL PROJECTING AT THE SECOND END OF SAID ROLL, AN ALKALINE ELECTROLYTE ABSORBED IN SAID SPACER MATERIAL, SAID SECOND END OF SAID ROLL PRESSING AGAINST THE TOP OF SAID COMPACT, AND A METAL TOP FOR AND INSULATED FROM SAID CONTAINER PRESSING AGAINST THE FIRST END OF SAID ROLL, SAID FOIL BEING CORRUGATED AT THE RATE OF 35 TO 45 CORRUGATIONS PER INCH TO A DEPTH SUCH THAT ITS THICKNESS IS NOT LESS THAN 3 1/2 TIMES AND NOT MATERIALLY MORE THAN 5 TIMES ITS ORIGINAL THICKNESS BEFORE CORUGATION.
Claim 2
Dependent Claim
147 words
A PRIMARY CELL SUITABLE FOR LOW TEMPERATURE OPERATION COMPRISING A METAL CONTAINER, A PRESSED POWDER COMPACT IN THE BOTTOM OF SAID CONTAINER INCLUDING A DEPOLARIZING ELECTRODE, AN ANODE-SPACER STRUCTURE IN SAID CONTAINER COMPRISING A ROLL OF ZINC FOIL INTERLEAVED WITH ABSORBENT SHEET SPACER MATERIAL, THE EDGE OF SAID FOIL PROJECTING AT A FIRST END OF SAID ROLL AND SPACER MATERIAL PROJECTING AT THE SECOND END OF SAID ROLL, AN ALKALINE ELECTROLYTE ABSORBED IN SAID SPACER MATERIAL, SAID SECOND END OF SAID ROLL PRESSING AGAINST THE TOP OF SAID COMPACT, AND A METAL TOP FOR AND INSULATED FROM SAID CONTAINER PRESSING AGAINST THE FIRST END OF SAID ROLL, SAID FOIL BEING CORRUGATED AT THE RATE OF 35 TO 45 CORRUGATIONS PER INCH TO A DEPTH SUCH THAT ITS THICKNESS IS NOT LESS THAN 3 1/2 TIMES AND NOT MATERIALLY MORE THAN 5 TIMES ITS ORIGINAL THICKNESS BEFORE CORUGATION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |