US2758010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of clay treatment
Assignee: Georgia Kaolin Co
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Filing: 1949-06-10
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Granted: 1956-08-07
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Expires: 1969-06-10
Abstract
No abstract record available.
Inventors
- 👤 Ben W Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:33
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C04B33/06; C04B33/30; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C01; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD OF TREATING CLAY COMPRISING THE STEPS OF FORMING AN AQUEOUS SLURRY OF THE CLAY TO BE TREATED, BLEACHING THE SLURRY WITH A HYDROSULPHITE BLEACHING AGENT UNTIL THE SLURRY CONTAINS TWO FRACTIONS IN SUSPENSION ONE OF WHICH IS PREDOMINATELY GRAY IN COLOR, ALL THE WHILE MAINTAINING THE PH BELOW 3.2, ADJUSTING THE PH TO THE RANGE 5.5 TO 8.5 AND SEPARATING THE PREDOMINANTLY GRAY FRACTION FROM THE SLURRY BY SEDIMENTATION.
Claim 2
Independent Claim
71 words
A METHOD OF TREATING CLAY COMPRISING THE STEPS OF FORMING AN AQUEOUS SLURRY OF THE CLAY TO BE TREATED, BLEACHING THE SLURRY WITH A HYDROSULPHITE BLEACHING AGENT UNTIL THE SLURRY CONTAINS TWO FRACTIONS IN SUSPENSION ONE OF WHICH IS PREDOMINATELY GRAY IN COLOR, ALL THE WHILE MAINTAINING THE PH BELOW 3.2, ADJUSTING THE PH TO THE RANGE 5.5 TO 8.5 AND SEPARATING THE PREDOMINANTLY GRAY FRACTION FROM THE SLURRY BY SEDIMENTATION.
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) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |