US2636574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized selective adsorption separation process
Assignee: Phillips Petroleum Co
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Filing: 1950-12-21
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Granted: 1953-04-28
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Expires: 1970-12-21
Abstract
No abstract record available.
Inventors
- 👤 John H Widdowson
- 👤 Howard R Sailors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:20
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/10; B01D53/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR SEPARATING A GASEOUS MIXTURE COMPRISING A MATERIAL OF INTERMEDIATE ABSORBABILITY, A LESS READILY ADSORBED MATERIAL AND A MORE READILY ADSORBED MATERIAL INT O THREE FRACTIONS WHICH COMPRISES: SUSPENDING A FINELY DI-
Claim 2
Dependent Claim
34 words
A PROCESS FOR SEPARATING A GASEOUS MIXTURE COMPRISING A MATERIAL OF INTERMEDIATE ABSORBABILITY, A LESS READILY ADSORBED MATERIAL AND A MORE READILY ADSORBED MATERIAL INT O THREE FRACTIONS WHICH COMPRISES: SUSPENDING A FINELY DI-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |