US2878353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistors
Assignee: EIDP Inc
•
Filing: 1954-12-16
•
Granted: 1959-03-17
•
Expires: 1974-12-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Berten E Ely
- 👤 Grabill Ernest Charles
- 👤 Jr Joseph Ross Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:17
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2282651A
Cited
US2392389A
Cited
US2472801A
Cited
US2578523A
Cited
US2714148A
Cited
US2752637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |