Patent US2152794A successfully refreshed from Google Patents.
US2152794A
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Oil well sample taking means
Assignee: Individual
•
Filing: 1938-02-08
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Granted: 1939-04-04
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Expires: 1958-02-08
Abstract
No abstract record available.
Inventors
- 👤 Dripps Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/14; E21B34/142; E21B49/00; E21B49/08; E21B49/081; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7734; Y10T137/7738
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-04-03 | 1942-10-03 | 1943-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-03 | 1946-10-03 | 1947-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-03 | 1950-10-03 | 1951-04-04 | $7700.00 | Window Closed / Lapsed |