US3764388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloride free amalgamation of zinc powder using acetic oxalic and boric acids
Assignee: Duracell Inc USA
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Filing: 1971-02-09
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Granted: 1973-10-09
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Expires: 1991-02-09
Abstract
Abstract A POROUS ANODE PRODUCED AND ADAPTED FOR USE IN ALKALINE SOLUTION, SAID ANODE IN SAID SOLUTION CONSTITUTING MEANS FOR OBVIATING GASSING CHARACTERISTICS AS CONTRASTED TO A POROUS ZINC ANODE PRODUCED IN OTHER WAYS. THE ESSENTIAL STEP IN THE INVENTION IS FREE ACID AMALGAMATION WITH AN ACID OTHER THAN HYDROCHLORIC ACID IN ORDER TO FORM A WATER SOLUBLE SALT OF THE FREE ACID.
Inventors
- 👤 N Marincic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:19
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |