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Patent US1981970A successfully refreshed from Google Patents.
US1981970A
Expired / Lapsed
US
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Abrasive wheel and a method of making the same
Assignee: Saint Gobain Abrasives Inc
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Filing: 1932-05-13
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Granted: 1934-11-27
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Expires: 1952-05-13
Abstract
No abstract record available.
Inventors
- 👤 Sanford Baalis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:46
CPC Classifications
B; B24; B24D; B24D18/00; B24D18/0009; B24D7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-11-26 | 1938-05-28 | 1938-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-26 | 1942-05-28 | 1942-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-26 | 1946-05-28 | 1946-11-27 | $7700.00 | Window Closed / Lapsed |