US2859267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary cell
Assignee: Duracell Inc USA
•
Filing: 1955-02-15
•
Granted: 1958-11-04
•
Expires: 1975-02-15
Abstract
No abstract record available.
Inventors
- 👤 Bruce J Garvey
- 👤 Schaef Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:28
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A DEPOLARIZER FOR AN ALKALINE PRIMARY CELL COMPRISING A MIXTURE OF APPROXIMATELY 72 TO 88 PERCENT BY WEIGHT OF CUPROUS OXIDE, APPROXIMATELY 2 TO 8 PERCENT BY WEIGHT OF COPPER POWDER AND APPROXIMATELY 10 TO 20 PERCENT BY WEIGHT OF CARBON.
Claim 2
Dependent Claim
41 words
A DEPOLARIZER FOR AN ALKALINE PRIMARY CELL COMPRISING A MIXTURE OF APPROXIMATELY 72 TO 88 PERCENT BY WEIGHT OF CUPROUS OXIDE, APPROXIMATELY 2 TO 8 PERCENT BY WEIGHT OF COPPER POWDER AND APPROXIMATELY 10 TO 20 PERCENT BY WEIGHT OF CARBON.
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |