Patent US6249742B1 successfully refreshed from Google Patents.
US2023041A
Expired / Lapsed
US
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Abrasive device
Assignee: STERLING GRINDING WHEEL Co
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Filing: 1935-04-16
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Granted: 1935-12-03
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Expires: 1955-04-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Ballash
- 👤 Bucheister Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:36
CPC Classifications
B; B24; B24D; B24D7/00; B24D7/06; B24D7/066
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) | 1938-12-02 | 1939-06-03 | 1939-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-02 | 1943-06-03 | 1943-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-02 | 1947-06-03 | 1947-12-03 | $7700.00 | Window Closed / Lapsed |