US2915808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making electrical capacitors
Assignee: AT&T Inc
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Filing: 1956-04-09
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Granted: 1959-12-08
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Expires: 1976-04-09
Abstract
No abstract record available.
Inventors
- 👤 Dale R Clemons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:31
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228; H01G4/018; H01G4/20; H01G4/22; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
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) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |