US2843980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive wheel and replaceable abrasive unit therefor
Assignee: Merit Products Inc
•
Filing: 1957-04-08
•
Granted: 1958-07-22
•
Expires: 1977-04-08
Abstract
No abstract record available.
Inventors
- 👤 Russell W Bernstein
- 👤 Block Aleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:04
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/02; B24D13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2259475A
Cited
US2599961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |