US3501287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-metal oxide compositions
Assignee: Duracell Inc USA
•
Filing: 1968-07-31
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Granted: 1970-03-17
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Expires: 1988-07-31
Abstract
No abstract record available.
Inventors
- 👤 Frank Mercer Lever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:22
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0237; C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2254976A
Cited
US2375506A
Cited
US3085876A
Cited
US3241949A
Cited
US3390981A
Cited
US3369886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |