US2694004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polishing material
Assignee: Primerica Inc
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Filing: 1951-07-20
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Granted: 1954-11-09
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Expires: 1971-07-20
Abstract
No abstract record available.
Inventors
- 👤 William W Coffeen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:52
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1454
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A POLISHING MATERIAL CONSISTING OF ZIRCONIUM SILICATE IN A STAGE OF SUBDIVISION SUCH THAT AT LEAST 40% BY WEIGHT OF THE PARTICLES LIE WITHIN THE RANGE OF 1 TO 4 MICRONS IN AVERAGE DIAMETER, NOT MORE THAN 40% BEING BELOW 1 MICRON IN AVERAGE DIAMETER, NOT MORE THAN 70% BEING BELOW 2 MICRONS, NOT MORE THAN 30% BEING IN THE RANGE OF 4 TO 10 MICRONS, AND NONE BEING ABOVE 10 MICRONS.
Claim 2
Dependent Claim
72 words
A POLISHING MATERIAL CONSISTING OF ZIRCONIUM SILICATE IN A STAGE OF SUBDIVISION SUCH THAT AT LEAST 40% BY WEIGHT OF THE PARTICLES LIE WITHIN THE RANGE OF 1 TO 4 MICRONS IN AVERAGE DIAMETER, NOT MORE THAN 40% BEING BELOW 1 MICRON IN AVERAGE DIAMETER, NOT MORE THAN 70% BEING BELOW 2 MICRONS, NOT MORE THAN 30% BEING IN THE RANGE OF 4 TO 10 MICRONS, AND NONE BEING ABOVE 10 MICRONS.
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) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |