US1919548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas choke for plunger lift devices
Assignee: Hughes Tool Co
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Filing: 1932-03-05
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Granted: 1933-07-25
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Expires: 1952-03-05
Abstract
No abstract record available.
Inventors
- 👤 Harold W Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:03
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/12; E; E21; E21B; E21B34/00; E21B34/02; E21B34/025; E21B43/00; E21B43/12; E21B43/121
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) | 1936-07-24 | 1937-01-23 | 1937-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-24 | 1941-01-23 | 1941-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-24 | 1945-01-23 | 1945-07-25 | $7700.00 | Window Closed / Lapsed |