Patent US1913041A successfully refreshed from Google Patents.
US1913041A
Expired / Lapsed
US
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Apparatus for controlling flow of fluid from oil wells
Assignee: Individual
•
Filing: 1930-09-11
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Granted: 1933-06-06
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Expires: 1950-09-11
Abstract
No abstract record available.
Inventors
- 👤 Raymond Gwynne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:34
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/8593; Y10T137/86348; Y10T137/86372; Y10T24/00; Y10T24/47; Y10T24/4773
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) | 1936-06-05 | 1936-12-05 | 1937-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-05 | 1940-12-05 | 1941-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-05 | 1944-12-05 | 1945-06-06 | $7700.00 | Window Closed / Lapsed |