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US3573886A
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Rare-earth oxide and wollastonite polishing composition
Assignee: Kerr McGee Corp
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Filing: 1968-08-19
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Granted: 1971-04-06
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Expires: 1988-08-19
Abstract
Abstract A POLISHING COMPOSITION COMPRISING A FINELY DIVIDED RARE EARTH OXIDE AND FROM ABOUT 0.1 TO 75 WEIGHT PERCENT WOLLASTONITE, SAID COMPOSITION HAVING A POLISHING SPEED IN EXCESS OF 9.
Inventors
- 👤 Nicholas J Goetzinger
- 👤 Walter L Silvernail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:56
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1454; A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61Q; A61Q11/00; C01; C01F; C01F17/00; C01F17/30; C01F17/32; C09G; C09G1/00; C09G1/02; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |