Patent US3243470A successfully refreshed from Google Patents.
US3243470A
Expired / Lapsed
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Separations process
Assignee: Monsanto Co
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Filing: 1960-12-27
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Granted: 1966-03-29
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 George D Davis
- 👤 Jr Earle C Makin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:33
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; C07C2529/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR SEPARATING A MIXTURE OF AT LEAST TWO UNSATURATED STRAIGHT-CHAIN HYDROCARBONS OF DIFFERENT DEGREES OF UNSATURATION WHICH COMPRISES INTRODUCING SAID MIXTURE CONCURRENTLY WITH HYDROGEN AND AT A TEMPERATURE OF 0 TO 500*C. INTO CONTACT WITH A MOLECULAR SIEVE SELECTED FROM THE GROUP CONSISTING OF SODIUM-ALUMINO-SILICATES, CALCIUM-ALUMINO-SILICATES, AND SODIUM-CALCIUM-ALUMINOSILICATES, SAID MOLECULAR SIEVE HAVING AT LEAST A PORTION OF ITS IONS REPLACED BY ION EXCHANGE WITH A METAL FROM GROUP VIII OF THE PERIODIC TABLE.
Claim 2
Dependent Claim
75 words
A PROCESS FOR SEPARATING A MIXTURE OF AT LEAST TWO UNSATURATED STRAIGHT-CHAIN HYDROCARBONS OF DIFFERENT DEGREES OF UNSATURATION WHICH COMPRISES INTRODUCING SAID MIXTURE CONCURRENTLY WITH HYDROGEN AND AT A TEMPERATURE OF 0 TO 500*C. INTO CONTACT WITH A MOLECULAR SIEVE SELECTED FROM THE GROUP CONSISTING OF SODIUM-ALUMINO-SILICATES, CALCIUM-ALUMINO-SILICATES, AND SODIUM-CALCIUM-ALUMINOSILICATES, SAID MOLECULAR SIEVE HAVING AT LEAST A PORTION OF ITS IONS REPLACED BY ION EXCHANGE WITH A METAL FROM GROUP VIII OF THE PERIODIC TABLE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |