Patent US2672199A successfully refreshed from Google Patents.
US2672199A
Expired / Lapsed
US
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Cement retainer and bridge plug
Assignee: Individual
•
Filing: 1948-03-12
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Granted: 1954-03-16
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Expires: 1968-03-12
Abstract
No abstract record available.
Inventors
- 👤 Patrick A Mckenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:04
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2150310A
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US2187482A
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US2189697A
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US2225143A
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US2331532A
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US2343076A
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US2325556A
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US2330259A
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US2427311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |