US3062737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydration process
Assignee: GAF Chemicals Corp
•
Filing: 1959-12-28
•
Granted: 1962-11-06
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Expires: 1979-12-28
Abstract
No abstract record available.
Inventors
- 👤 Julian L Azorlosa
- 👤 Anthony J Martinelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/243; Y; Y10; Y10S; Y10S159/00; Y10S159/15; Y10S159/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR DEHYDRATING AN AQUEOUS MASS WHICH COMPRISES PERMITTING THE WATER CONTAINED IN SAID MASS TO PASS THEREFROM THROUGH A SEMIPERMEABLE MEMBRANE INTO AN AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 25% BY WEIGHT BASED ON THE WEIGHT OF THE SOLUTION OF A WATER SOLUBLE POLYMER.
Claim 2
Dependent Claim
46 words
A PROCESS FOR DEHYDRATING AN AQUEOUS MASS WHICH COMPRISES PERMITTING THE WATER CONTAINED IN SAID MASS TO PASS THEREFROM THROUGH A SEMIPERMEABLE MEMBRANE INTO AN AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 25% BY WEIGHT BASED ON THE WEIGHT OF THE SOLUTION OF A WATER SOLUBLE POLYMER.
References Cited (Backward Citations)
US1885393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |