Patent US2940841A successfully refreshed from Google Patents.
US2940841A
Expired / Lapsed
US
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Abrasives
Assignee: Abrasive and Metal Products Co
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Filing: 1957-03-11
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Granted: 1960-06-14
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Expires: 1977-03-11
Abstract
No abstract record available.
Inventors
- 👤 John R Gregor
- 👤 Harold E Van Orden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:11
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/342; B24D3/344
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A CURED MOLDED ABRASIVE ARTICLE COMPRISING ABRASIVE GRAINS, A THERMOSET PHENOLIC BINDER RESIN AND A FILLER CONSISTING ESSENTIALLY OF A MIXTURE OF ANTIMONY SULFIDE AND AT LEAST ONE ALKALI METAL SALT OF SULFURIC, HYDROCHLORIC AND HYDROBROMIC ACIDS AND IN WHICH SAID ANTIMONY SULFIDE IS PRESENT IN AN AMOUNT OF FROM 5% TO 85% BY VOLUME OF 2% BY VOLUME OF THE TOTAL BONDING MATERIAL.
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |