Patent US1565274A successfully refreshed from Google Patents.
US1565274A
Expired / Lapsed
US
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Spark plug and the like
Assignee: Individual
•
Filing: 1923-02-12
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Granted: 1925-12-15
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Expires: 1943-02-12
Abstract
No abstract record available.
Inventors
- 👤 Jr John B Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:02
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12229; Y10T428/12264; Y10T428/12271; Y10T428/1241; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12896; Y10T428/12903; Y10T428/12917; Y10T428/12924
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) | 1928-12-14 | 1929-06-15 | 1929-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-12-14 | 1933-06-15 | 1933-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-12-14 | 1937-06-15 | 1937-12-15 | $7700.00 | Window Closed / Lapsed |