US3154435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline dry cell
Assignee: Hitachi Ltd
•
Filing: 1961-04-24
•
Granted: 1964-10-27
•
Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 Kitagawa Hiroshi
- 👤 Yonago Minoru
- 👤 Fujita Masaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:55
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/362; H01M4/364; H01M6/00; H01M6/04; H01M6/06; H01M6/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A DEPOLARIZER FOR AN ALKALINE PRIMARY CELL COMPRISING A MIXTURE OF APPROXIMATELY 0.5 TO 20 PERCENT BY WEIGHT OF BISMUTH OXIDE, APPROXIMATELY 0.5 TO 20 PERCENT BY WEIGHT OF BISMUTH OXYCHLORIDE, AND THE REMAINDER BEING CUPRIC OXIDE.
Claim 2
Dependent Claim
37 words
A DEPOLARIZER FOR AN ALKALINE PRIMARY CELL COMPRISING A MIXTURE OF APPROXIMATELY 0.5 TO 20 PERCENT BY WEIGHT OF BISMUTH OXIDE, APPROXIMATELY 0.5 TO 20 PERCENT BY WEIGHT OF BISMUTH OXYCHLORIDE, AND THE REMAINDER BEING CUPRIC OXIDE.
References Cited (Backward Citations)
US1195677A
Cited
US2859267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |