US2649340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operation procedure for gas lifts
Assignee: Houdry Process Corp
•
Filing: 1950-06-14
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Granted: 1953-08-18
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Expires: 1970-06-14
Abstract
No abstract record available.
Inventors
- 👤 William W Weinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:44
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1390974A
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US1364532A
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US1347358A
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GB180397A
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US1498630A
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US1549285A
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GB268667A
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US2493911A
Cited
US2509983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |