US2549968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for selective lowpressure desorption of liquids
Assignee: Phillips Petroleum Co
•
Filing: 1948-07-30
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Granted: 1951-04-24
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Expires: 1968-07-30
Abstract
No abstract record available.
Inventors
- 👤 Karl H Hachmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:53
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1119176A
Cited
US1934029A
Cited
US2182862A
Cited
US2216939A
Cited
US2294214A
Cited
US2435941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |