US2639306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile battery fabrication
Assignee: United States Department of the Army
•
Filing: 1951-02-02
•
Granted: 1953-05-19
•
Expires: 1971-02-02
Abstract
No abstract record available.
Inventors
- 👤 Fischbach Adolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:20
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR668569A
Cited
FR771012A
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US2040255A
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GB443983A
Cited
FR867151A
Cited
US2322210A
Cited
US2428850A
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US2441896A
Cited
US2475152A
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US2564495A
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US2582973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |