US3095384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogel treatment
Assignee: ExxonMobil Oil Corp
•
Filing: 1960-09-09
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Granted: 1963-06-25
•
Expires: 1980-09-09
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Jenkins
- 👤 Albert B Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:50
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD OF PARTIALLY DEHYDRATING AND REDUCING THE VOLUME OF A SILICEOUS HYDROGEL COMPRISING TREATING SAID HYDROGEL, AFTER ITS FORMATION AND PRIOR TO DRYING, WITH AN AQUEOUS SOLUTION OF AMMONIUM HYDROXIDE CONTAINING AT LEAST 10% AMMONIA ON A WEIGHT BASIS FOR A PERIOD OF AT LEAST ONE HALF AN HOUR AT A TEMPARATURE OF FROM ABOUT 30* F. UP TO THE BOILING POINT OF THE AMMONIUM HYDROXIDE SOLUTION TO THEREBY SHRINK THE HYDROGEL.
Claim 2
Independent Claim
73 words
A METHOD OF PARTIALLY DEHYDRATING AND REDUCING THE VOLUME OF A SILICEOUS HYDROGEL COMPRISING TREATING SAID HYDROGEL, AFTER ITS FORMATION AND PRIOR TO DRYING, WITH AN AQUEOUS SOLUTION OF AMMONIUM HYDROXIDE CONTAINING AT LEAST 10% AMMONIA ON A WEIGHT BASIS FOR A PERIOD OF AT LEAST ONE HALF AN HOUR AT A TEMPARATURE OF FROM ABOUT 30* F. UP TO THE BOILING POINT OF THE AMMONIUM HYDROXIDE SOLUTION TO THEREBY SHRINK THE HYDROGEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |