Patent US1910762A successfully refreshed from Google Patents.
US1910762A
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US
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Gas lift apparatus
Assignee: Union Oil Company of California
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Filing: 1932-03-08
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Granted: 1933-05-23
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Expires: 1952-03-08
Abstract
No abstract record available.
Inventors
- 👤 Grinnell Samuel Henry
- 👤 Albert C Rubel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:27
CPC Classifications
F; F04; F04F; F04F1/00; F04F1/06; E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/068; E21B43/00; E21B43/12; E21B43/121; E21B43/122
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) | 1936-05-22 | 1936-11-21 | 1937-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-22 | 1940-11-21 | 1941-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-22 | 1944-11-21 | 1945-05-23 | $7700.00 | Window Closed / Lapsed |