Patent US2547986A successfully refreshed from Google Patents.
US2547986A
Expired / Lapsed
US
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Method for removal of broken spark plugs
Assignee: Individual
•
Filing: 1946-11-27
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Granted: 1951-04-10
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Expires: 1966-11-27
Abstract
No abstract record available.
Inventors
- 👤 Henry Leland Van Dermark
- 👤 Hazel L Van Dermark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:41
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/48; B25B13/483; Y; Y10; Y10S; Y10S29/00; Y10S29/081; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49721; Y10T29/49815; Y10T29/49821; Y10T408/00; Y10T408/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US961375A
Cited
US1507647A
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US1430527A
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US1458076A
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US1700101A
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US2272271A
Cited
US2299160A
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US2391405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |