US3597251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium carbonate product
Assignee: Wyandotte Chemicals Corp
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Filing: 1968-11-19
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Granted: 1971-08-03
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Expires: 1988-11-19
Abstract
Abstract PREPARTION OF AN AQUEOUS CALCILUM CARBONATE SLURRY CHARACTERIZED BY HIGH STABILITY, HIGH SOLIDS CONTENT, AND LOW VISCOSITY BY INCORPORATING IN SUCH SLURRY ABOUT 0.05 TO 0.5% BY WEIGHT OF EITHER SUBSTANTIALLY PURE ZINC OXIDE OR ZIRCONIUM OXIDE OR MIXTURE BOTH.
Inventors
- 👤 Daniel Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:08
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/22
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |