US3053774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous regeneration of silica gel
Assignee: California Research LLC
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Filing: 1960-05-16
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Granted: 1962-09-11
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Expires: 1980-05-16
Abstract
No abstract record available.
Inventors
- 👤 James E Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:35
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/20; B01D15/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD FOR REGENERATING A SILICA GEL ADSORBENT SATURATED WITH A WATER-INSOLUBLE PERCOLATE AND ADSORBATE WHICH COMPRISES INTRODUCING WATER INTO SAID SATURATED ADSORBENT IN AMOUNTS SUFFICIENT TO DISPLACE SAID PERCOLATE WITHOUT DESORBING SAID ADSORBATE, MAINTAINING SAID WATER AT ABOUT AMBIENT TEMPERATURES, DESORBING SAID ADSORBATE BY CONTACTING THE PERCOLATE-FREE ADSORBENT WITH A POLAR DESORBING AGENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS AND KETONES, AND THEREAFTER HEAT-TREATING THE SILICA GEL ADSORBENT AT A TEMPERATURE IN THE RANGE OF ABOUT 250*-800*F. UNTIL SAID ADSORBENT IS SUFFICIENTLY DRY TO BE REUSED.
Claim 2
Independent Claim
88 words
A METHOD FOR REGENERATING A SILICA GEL ADSORBENT SATURATED WITH A WATER-INSOLUBLE PERCOLATE AND ADSORBATE WHICH COMPRISES INTRODUCING WATER INTO SAID SATURATED ADSORBENT IN AMOUNTS SUFFICIENT TO DISPLACE SAID PERCOLATE WITHOUT DESORBING SAID ADSORBATE, MAINTAINING SAID WATER AT ABOUT AMBIENT TEMPERATURES, DESORBING SAID ADSORBATE BY CONTACTING THE PERCOLATE-FREE ADSORBENT WITH A POLAR DESORBING AGENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS AND KETONES, AND THEREAFTER HEAT-TREATING THE SILICA GEL ADSORBENT AT A TEMPERATURE IN THE RANGE OF ABOUT 250*-800*F. UNTIL SAID ADSORBENT IS SUFFICIENTLY DRY TO BE REUSED.
References Cited (Backward Citations)
US2236679A
Cited
US2769751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |