US3378356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composites of beryllium-coppermagnesium
Assignee: Duracell Inc USA
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Filing: 1967-05-15
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Granted: 1968-04-16
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Earl I Larsen
- 👤 Richard H Krock
- 👤 Clintford R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:43
CPC Classifications
C; C22; C22C; C22C25/00
Claims Analysis
Total Claims: 0
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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) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |