US2990910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for circulating and controlling liquids in gas-liquid systems
Assignee: Individual
•
Filing: 1957-04-01
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Granted: 1961-07-04
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Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Garman O Kimmell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:46
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/04; B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735506A
Cited
US1161787A
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US1898637A
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US1968655A
Cited
US2241717A
Cited
US2768703A
Cited
US2787451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |