US2725286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive and grinding wheel
Assignee: Saint Gobain Abrasives Inc
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Filing: 1953-03-10
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Granted: 1955-11-29
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Expires: 1973-03-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Loring Coes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:41
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1409; C09K3/1418
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A GRINDING WHEEL CONSISTING OF ABRASIVE CONSISTING OF SINTERED MATERIAL DERIVED FROM CALCINED BAUXITE REDUCED TO A FINE POWDER, PRESSED INTO MASSES AND SINTERED AT 1550* C. FOR AT LEAST TWO HOURS, SAID ABRASIVE HAVING A COMPOSITION OF
Claim 2
Dependent Claim
38 words
A GRINDING WHEEL CONSISTING OF ABRASIVE CONSISTING OF SINTERED MATERIAL DERIVED FROM CALCINED BAUXITE REDUCED TO A FINE POWDER, PRESSED INTO MASSES AND SINTERED AT 1550* C. FOR AT LEAST TWO HOURS, SAID ABRASIVE HAVING A COMPOSITION OF
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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |