Patent US2177943A successfully refreshed from Google Patents.
US2177943A
Expired / Lapsed
US
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Ceramic body for spark plug insulators
Assignee: Motors Liquidation Co
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Filing: 1938-09-07
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Granted: 1939-10-31
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Expires: 1958-09-07
Abstract
No abstract record available.
Inventors
- 👤 Taine G Mcdougal
- 👤 Barlett Helen Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:58
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T13/38; C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-10-30 | 1943-05-01 | 1943-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-30 | 1947-05-01 | 1947-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-30 | 1951-05-01 | 1951-10-31 | $7700.00 | Window Closed / Lapsed |