US1990927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple unit grinding wheel
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1933-01-20
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Granted: 1935-02-12
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Expires: 1953-01-20
Abstract
No abstract record available.
Inventors
- 👤 Hugo W H Beth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:51
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/06; B24D5/066; B24D5/16
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) | 1938-02-11 | 1938-08-13 | 1939-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-11 | 1942-08-13 | 1943-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-11 | 1946-08-13 | 1947-02-12 | $7700.00 | Window Closed / Lapsed |