US2908549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of selective sorbents
Assignee: Texaco Inc
•
Filing: 1957-10-22
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Granted: 1959-10-13
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Expires: 1977-10-22
Abstract
No abstract record available.
Inventors
- 👤 John H Estes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:21
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/026; Y; Y10; Y10S; Y10S423/00; Y10S423/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A PROCESS FOR CONVERTING PARAENT SOLIUM FORM OF TYPE A ZEOLITE OF EFFECTIVE PORE SIZE ABOUT 4 A. INTO THE CORRESPONDING CALIUM-SODIUM TYPE A ZEOLITE OF EFFECTIVE PORE SIZE ABOUT 5 A. BY EXCHANGING A PORTION OF THE SODIUM CONTENT ORIGINALLY PRESENT IN SAID PARENT ZEOLITE FOR CALCIUM IONS FROM AN AQUEOUS MEDIUM CONTAINING A STABLE, WATER-SOLUBLE CALCIUM SALT, THE IMPROVEMENT WHICH COMPRISES: ESTABLISHING AND MAINTAINING PH OF SAID AQUEOUS MEDIUM AT LEAST AS HIGH AS ABOUT 11 BY ADDITION OF LIME THERETO MAINTAINING TEMPERATURE OF SAID MEDIUM AT ABOUT 40-400* F., AND MAINTAINING THE RESULTING CONCENTRATION OF SODIUM IN SAID AQUEOUS MEDIUM BELOW ABOUT 0.9 N BY REGULATING THE RELATIVE PROPORTIONS OF AQUEOUS MEDIUM AND ZEOLITE UNDERGOING THE ION EXCHANGE CONTACT.
Claim 2
Dependent Claim
123 words
IN A PROCESS FOR CONVERTING PARAENT SOLIUM FORM OF TYPE A ZEOLITE OF EFFECTIVE PORE SIZE ABOUT 4 A. INTO THE CORRESPONDING CALIUM-SODIUM TYPE A ZEOLITE OF EFFECTIVE PORE SIZE ABOUT 5 A. BY EXCHANGING A PORTION OF THE SODIUM CONTENT ORIGINALLY PRESENT IN SAID PARENT ZEOLITE FOR CALCIUM IONS FROM AN AQUEOUS MEDIUM CONTAINING A STABLE, WATER-SOLUBLE CALCIUM SALT, THE IMPROVEMENT WHICH COMPRISES: ESTABLISHING AND MAINTAINING PH OF SAID AQUEOUS MEDIUM AT LEAST AS HIGH AS ABOUT 11 BY ADDITION OF LIME THERETO MAINTAINING TEMPERATURE OF SAID MEDIUM AT ABOUT 40-400* F., AND MAINTAINING THE RESULTING CONCENTRATION OF SODIUM IN SAID AQUEOUS MEDIUM BELOW ABOUT 0.9 N BY REGULATING THE RELATIVE PROPORTIONS OF AQUEOUS MEDIUM AND ZEOLITE UNDERGOING THE ION EXCHANGE CONTACT.
References Cited (Backward Citations)
US1756275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |