US2970451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption-desorption in absorber liquid
Assignee: Hydrocarbon Research Inc
•
Filing: 1958-02-04
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Granted: 1961-02-07
•
Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Stanley W Ehrlich
- 👤 Morgan C Sze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:18
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1456; B01D53/1475; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y10; Y10S; Y10S62/00; Y10S62/928; Y10S62/929; Y10S62/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048656A
Cited
US2236964A
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US2297675A
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US2555060A
Cited
US2596785A
Cited
US2610704A
Cited
US2826266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |