US2918933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: OIL CENTER TOOL CO
•
Filing: 1952-11-14
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Granted: 1959-12-29
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Expires: 1972-11-14
Abstract
No abstract record available.
Inventors
- 👤 Boyd D Boitnott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:44
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0146; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7789; Y10T137/7791
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US33873A
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US483979A
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US842393A
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US930158A
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US1467522A
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US1934759A
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US2146537A
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US2192042A
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US2340954A
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US2577391A
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US2629578A
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US2701704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |