US2810207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for drying silica aquagel
Assignee: EIDP Inc
•
Filing: 1954-06-08
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Granted: 1957-10-22
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Expires: 1974-06-08
Abstract
No abstract record available.
Inventors
- 👤 John R Mcwhorter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/157; C01B33/158; C01B33/1585
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A PROCESS FOR VAPORIZING WATER FROM A SILICA AQUAGEL-BUTANOL-1 MIXTURE WITHOUT SUBSTANTIALLY SHRINKING THE GEL, THE MIXTURE CONTAINING WATER AND BUTANOL-1 IN SUCH A PROPORTION THAT BOTH A WATER-RICH PHASE AND A BUTANOL-RICH PHASE ARE FORMED AT THE INITIAL TEMPERATURE, THE STEPS COMPRISING HEATING THE AQUAGEL-BUTANOL MIXTURE UNDER SUPER-ATMOSPHERIC PRESSURE TO A TEMPERATURE ABOVE ITS UPPER CONSOLUTE TEMPERATURE WHILE MAINTAINING THE TOTAL BUTANOL TO TOTAL WATER WEIGHT RATIO IN THE MIXTURE BELOW 0.53:1, AND VAPORIZING WATER FROM THE MIXTURE BY
Claim 2
Dependent Claim
81 words
IN A PROCESS FOR VAPORIZING WATER FROM A SILICA AQUAGEL-BUTANOL-1 MIXTURE WITHOUT SUBSTANTIALLY SHRINKING THE GEL, THE MIXTURE CONTAINING WATER AND BUTANOL-1 IN SUCH A PROPORTION THAT BOTH A WATER-RICH PHASE AND A BUTANOL-RICH PHASE ARE FORMED AT THE INITIAL TEMPERATURE, THE STEPS COMPRISING HEATING THE AQUAGEL-BUTANOL MIXTURE UNDER SUPER-ATMOSPHERIC PRESSURE TO A TEMPERATURE ABOVE ITS UPPER CONSOLUTE TEMPERATURE WHILE MAINTAINING THE TOTAL BUTANOL TO TOTAL WATER WEIGHT RATIO IN THE MIXTURE BELOW 0.53:1, AND VAPORIZING WATER FROM THE MIXTURE BY
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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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |