Patent US3297516A successfully refreshed from Google Patents.
US3297516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dispersing asbestos
Assignee: Union Carbide Corp
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Filing: 1963-08-28
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Granted: 1967-01-10
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Expires: 1983-08-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Naumann
- 👤 William H Dresher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:28
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE PREPARATION OF STABLE SUSPENSION OF FINELY DIVIDED CHRYSOTILE ASBESTOS WHICH COMPRISES CONTACTING AN AQUEOUS SLURRY OF CHRYSOTILE ASBESTOS WITH A METAL ALUMINATE SELECTED FROM THE CLASS CONSISTING OF SODIUM ALUMINATE, POTASSIUM ALUMINATE, CALCIUM ALUMINATE AND BARIUM ALUMINATE, ADDING A MONOBASIC ACID SELECTED FROM THE CLASS CONSISTING OF ACETIC ACID, FORMIC ACID, HYDROCHLORIC ACID, AND NITRIC ACID UNTIL THE PH OF THE RESULTING AQUEOUS SLURRY IS FROM ABOUT 4.0 TO ABOUT 6.0, THEREBY FORMING A HIGHLY CHARGED, STRONGLY ADSORBABLE, POLYMOLECULAR COLLOID OF MATERIAL SELECTED FROM THE CLASS CONSISTING OF ALUMINUM HYDROXIDES AND HYDRATED ALUMINUM OXIDES AND THEN APPLYING HIGH SPEED SHEARING FORCES TO THE SLURRY.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE PREPARATION OF STABLE SUSPENSION OF FINELY DIVIDED CHRYSOTILE ASBESTOS WHICH COMPRISES CONTACTING AN AQUEOUS SLURRY OF CHRYSOTILE ASBESTOS WITH A METAL ALUMINATE SELECTED FROM THE CLASS CONSISTING OF SODIUM ALUMINATE, POTASSIUM ALUMINATE, CALCIUM ALUMINATE AND BARIUM ALUMINATE, ADDING A MONOBASIC ACID SELECTED FROM THE CLASS CONSISTING OF ACETIC ACID, FORMIC ACID, HYDROCHLORIC ACID, AND NITRIC ACID UNTIL THE PH OF THE RESULTING AQUEOUS SLURRY IS FROM ABOUT 4.0 TO ABOUT 6.0, THEREBY FORMING A HIGHLY CHARGED, STRONGLY ADSORBABLE, POLYMOLECULAR COLLOID OF MATERIAL SELECTED FROM THE CLASS CONSISTING OF ALUMINUM HYDROXIDES AND HYDRATED ALUMINUM OXIDES AND THEN APPLYING HIGH SPEED SHEARING FORCES TO THE SLURRY.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |