Patent US2988503A successfully refreshed from Google Patents.
US2988503A
Expired / Lapsed
US
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Process of adsorption
Assignee: Union Carbide Corp
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Filing: 1956-07-25
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Granted: 1961-06-13
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Robert M Milton
- 👤 Donald W Breck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:21
CPC Classifications
B; B01; B01D; B01D15/00; C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A PROCESS FOR SEPARATING MOLECULES HAVING MAXIMUM DIMENSIONS OF THEIR MINIMUM PROJECTED CROSS-SECTIONS LARGER THAN THAT OF HEPTACOSAFLUOROTRIBUTYL AMINE FROM A MIXTURE THEREOF WITH MOLECULES HAVING SUCH A DIMENSION SMALLER THAN THAT OF HEPTACOSAFLUOROTRIBUTYL AMINE, THE IMPROVEMENT COMPRISING MIXING SAID MIXTURE OF MOLECULES WITH AT LEAST PARTIALLY DEHYDRATED FAUJASITE, AND ADSORBING WITH SAID FAUJASITE AT LEAST A PORTION OF SAID MOLECULES HAVING SAID SMALLER DIMENSION FROM SAID MIXTURE.
Claim 2
Dependent Claim
69 words
IN A PROCESS FOR SEPARATING MOLECULES HAVING MAXIMUM DIMENSIONS OF THEIR MINIMUM PROJECTED CROSS-SECTIONS LARGER THAN THAT OF HEPTACOSAFLUOROTRIBUTYL AMINE FROM A MIXTURE THEREOF WITH MOLECULES HAVING SUCH A DIMENSION SMALLER THAN THAT OF HEPTACOSAFLUOROTRIBUTYL AMINE, THE IMPROVEMENT COMPRISING MIXING SAID MIXTURE OF MOLECULES WITH AT LEAST PARTIALLY DEHYDRATED FAUJASITE, AND ADSORBING WITH SAID FAUJASITE AT LEAST A PORTION OF SAID MOLECULES HAVING SAID SMALLER DIMENSION FROM SAID MIXTURE.
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |