Patent US2904313A successfully refreshed from Google Patents.
US2904313A
Expired / Lapsed
US
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Key-seat reamer
Assignee: Individual
•
Filing: 1957-03-12
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Granted: 1959-09-15
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Expires: 1977-03-12
Abstract
No abstract record available.
Inventors
- 👤 Lorenzer D V Wisenbaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:00
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/907; Y10T408/909; Y10T408/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2027398A
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US973887A
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US1758995A
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US1887373A
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US1937742A
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US1932488A
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US2717764A
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US2790623A
Cited
US2727730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |