US3071455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polishing material
Assignee: Camelot Industries Corp
•
Filing: 1959-04-22
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Granted: 1963-01-01
•
Expires: 1979-04-22
Abstract
No abstract record available.
Inventors
- 👤 Cameron G Harman
- 👤 Abraham Lothar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:49
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1454
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A POLISHING PREPARATION CONSISTING OF A POLISHING SLURRY INCLUDING A POWDERED OXIDE POLISHING MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF IRON, CHROMIUM, SILICON, TIN, ZIRCONIUM AND CERIUM, HAVING A SOLIDS CONCENTRATION IN THE RANGE OF 5% TO 50% BY WEIGHT, AND INCLUDING AS AN ESSENTIAL INGREDIENT SILICON CARBIDE IN WHICH SUBSTANTIALLY ALL PARTICLES ARE BETWEEN 3/4 AND 15 MICRONS IN SIZE.
Claim 2
Dependent Claim
64 words
A POLISHING PREPARATION CONSISTING OF A POLISHING SLURRY INCLUDING A POWDERED OXIDE POLISHING MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF IRON, CHROMIUM, SILICON, TIN, ZIRCONIUM AND CERIUM, HAVING A SOLIDS CONCENTRATION IN THE RANGE OF 5% TO 50% BY WEIGHT, AND INCLUDING AS AN ESSENTIAL INGREDIENT SILICON CARBIDE IN WHICH SUBSTANTIALLY ALL PARTICLES ARE BETWEEN 3/4 AND 15 MICRONS IN SIZE.
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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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |