US3066012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing alumina gels
Assignee: WR Grace and Co
•
Filing: 1960-04-04
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Granted: 1962-11-27
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Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles P Wilson
- 👤 Frank G Clapetta
- 👤 Jr James W Elston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:43
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; B; B01; B01J; B01J20/00; B01J20/02; B01J20/06; B01J20/08; C01P; C01P2006/00; C01P2006/12; C01P2006/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR PREPARING ALUMINA GELA WHICH COMPRISES CONTACTING AN ALUMINUM SULFATE SOLUTION WITH COLCIUM CARBONATE TO FORM A BASIC ALUMINUM SULFATE SOL AT A PH NOT EXCEEDING 3.5, COMMINGLING WITH SAID SOL SUFFICIENT SODIUM CARBONATE SOLUTION AND THEREBY FORM AN ALUMINA GEL, AND WASHING SAID GEL TO REMOVE SOLUBLE IMURITIES AND DRYING SAID GEL.
Claim 2
Dependent Claim
55 words
A PROCESS FOR PREPARING ALUMINA GELA WHICH COMPRISES CONTACTING AN ALUMINUM SULFATE SOLUTION WITH COLCIUM CARBONATE TO FORM A BASIC ALUMINUM SULFATE SOL AT A PH NOT EXCEEDING 3.5, COMMINGLING WITH SAID SOL SUFFICIENT SODIUM CARBONATE SOLUTION AND THEREBY FORM AN ALUMINA GEL, AND WASHING SAID GEL TO REMOVE SOLUBLE IMURITIES AND DRYING SAID GEL.
References Cited (Backward Citations)
US2898306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-26 | 1966-05-28 | 1966-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-26 | 1970-05-28 | 1970-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-26 | 1974-05-28 | 1974-11-27 | $7700.00 | Window Closed / Lapsed |