Patent US2436712A successfully refreshed from Google Patents.
US2436712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture shield for spark plugs
Assignee: SEALTIGHT Corp
•
Filing: 1946-07-13
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Granted: 1948-02-24
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Expires: 1966-07-13
Abstract
No abstract record available.
Inventors
- 👤 George G Burrell
- 👤 Arthur L Hulshizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:50
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/02; H01T13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1139973A
Cited
US1191162A
Cited
GB166680A
Cited
GB290820A
Cited
US2008573A
Cited
US1967480A
Cited
US2149137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |