Patent US3090679A successfully refreshed from Google Patents.
US3090679A
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Process for preparing aqueous silicate solutions
Assignee: EIDP Inc
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Filing: 1961-07-21
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Granted: 1963-05-21
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Expires: 1981-07-21
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Tauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:05
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C01B33/325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR THE PREPARATION OF AQUEOUS SODIUM SILICATE SOLUTIONS FROM SOLID SODIUM SILICATE GLASS, SAID PORCESS COMPRISING (A) DISSOLVING ENOUGH OF SAID SILICATE GLASS IN WATER UNDER STEAM PRESSURE OF FROM ABOUT 20 TO ABOUT 100LBS. PER SQUARE INCH TO FORM A SOLUTION HAVING A SPECIFIC GRAVITY OF FROM 32* TO 38* BE.; AND THEN (B) EVAPORATING WATER FROM SAID SOLUTION UNDER REDUCED PRESSURE UNTIL SAID SOLUTION HAS A SPECIFIC GRAVITY OF AT LEAST 41* BE.
Claim 2
Dependent Claim
77 words
A PROCESS FOR THE PREPARATION OF AQUEOUS SODIUM SILICATE SOLUTIONS FROM SOLID SODIUM SILICATE GLASS, SAID PORCESS COMPRISING (A) DISSOLVING ENOUGH OF SAID SILICATE GLASS IN WATER UNDER STEAM PRESSURE OF FROM ABOUT 20 TO ABOUT 100LBS. PER SQUARE INCH TO FORM A SOLUTION HAVING A SPECIFIC GRAVITY OF FROM 32* TO 38* BE.; AND THEN (B) EVAPORATING WATER FROM SAID SOLUTION UNDER REDUCED PRESSURE UNTIL SAID SOLUTION HAS A SPECIFIC GRAVITY OF AT LEAST 41* BE.
References Cited (Backward Citations)
US1111918A
Cited
US2251515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |