US2423293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making abrasive wheels
Assignee: Individual
•
Filing: 1943-11-19
•
Granted: 1947-07-01
•
Expires: 1963-11-19
Abstract
No abstract record available.
Inventors
- 👤 August C Ciell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:20
CPC Classifications
B; B24; B24D; B24D18/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US642828A
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US1983082A
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US1981970A
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US1997957A
Cited
US2281525A
Cited
US2248990A
Cited
US2250580A
Cited
US2278301A
Cited
US2342121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |