US3594203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity stabilized clay slurries
Assignee: BASF Catalysts LLC
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Filing: 1968-11-19
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Granted: 1971-07-20
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Expires: 1988-11-19
Abstract
Abstract A HIGH SOLIDS SLURRY OF A KAOLIN CLAY COATING PIGMENT OBTAINED BY THE FLOTATION OF COLORED IMPURITIES FROM SEDIMENTARY GEORGIA KAOLIN CLAY IS DEFLOCCULATED AND THE VISCOSITY OF THE DEFLUOCCULATED SLURRY IS ADJUSTED TO A MINIMUM VALUE WITH TETRASODIUM PVROPHOSPHATE. A SMALL AMOUNT OF AN ORGANIC POLYANIONIC POLYMER IS INCORPORATED IN THE SLURRY AS A STABILIZER. THE QUANTITY OF ORGANIC POLYMER IS SUCH THAT THE VISCOSITY OF THE FRESHLY PREPARED SLURRY IS SUBSTANTIALLY UNCHANGED BY ITS PRESENCE.
Inventors
- 👤 Edgar W Sawyer Jr
- 👤 Walter L Haden Jr
- 👤 Louis L Petty
- 👤 Barry S Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:39
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305; C09; C09D; C09D17/00; C09D17/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |