Patent US2445901A successfully refreshed from Google Patents.
US2445901A
Expired / Lapsed
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Method of seating piston rings in internal-combustion engines
Assignee: Gulf Research and Development Co
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Filing: 1945-06-19
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Granted: 1948-07-27
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Expires: 1965-06-19
Abstract
No abstract record available.
Inventors
- 👤 Henry A Ambrose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:22
CPC Classifications
C; C10; C10M; C10M177/00; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/063; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2201/10; C10M2201/102; C10M2201/103; C10M2201/105; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US482249A
Cited
US830739A
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US1463502A
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US1588290A
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US1879874A
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US2050139A
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US2278851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |