US3269815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated abrasive grain
Assignee: GEN ABRASIVE Co Inc
•
Filing: 1963-10-04
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Granted: 1966-08-30
•
Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 Koopman Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:47
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1436
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
ABRASIVE GRAIN; SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND SILICON CARBIDE COATED WITH A GLASS FILM HAVING A MELTING POINT BELOW THAT OF THE GRAIN AND FINELY DIVIDED PARTICLES CEMENTED TO SAID GRAIN BY SAID CONSISTING SAID PARTICLES BEING SELECTED FROM TH GROUP CONSISTING OF SILICON CARBIE, AND SILICON NITRIDE.
Claim 2
Dependent Claim
51 words
ABRASIVE GRAIN; SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND SILICON CARBIDE COATED WITH A GLASS FILM HAVING A MELTING POINT BELOW THAT OF THE GRAIN AND FINELY DIVIDED PARTICLES CEMENTED TO SAID GRAIN BY SAID CONSISTING SAID PARTICLES BEING SELECTED FROM TH GROUP CONSISTING OF SILICON CARBIE, AND SILICON NITRIDE.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |