US2858838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill pipe float valve
Assignee: Individual
•
Filing: 1955-11-10
•
Granted: 1958-11-04
•
Expires: 1975-11-10
Abstract
No abstract record available.
Inventors
- 👤 Scaramucci Domer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:14
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0491; Y10T137/053; Y10T137/7504; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7866; Y10T137/7867; Y10T137/7868; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1014775A
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US1297312A
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US1767538A
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US1860004A
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US2148850A
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US1984107A
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US1944770A
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US2011812A
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US2192670A
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US2473591A
Cited
US2477720A
Cited
US2744727A
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US2750958A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |