US3716951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cup grinding wheels
Assignee: Individual
•
Filing: 1971-05-05
•
Granted: 1973-02-20
•
Expires: 1991-05-05
Abstract
Abstract A CUP GRINDING WHEEL HAS A FRUSTO-CONICAL CENTRAL OPENING THERETHROUGH. A FRUSTO-CONICAL SHAPED NUT ENGAGES A SPINDLE OF A GRINGING TOOL AND THE OPENING OF THE CUP GRINDING WHEEL TO SECURE THE CUP GRINDING WHEEL TO AN ADAPTER PLATE SEPARATE FROM OR INTEFRAL WITH THE GRINGING TOOL. D R A W I N G
Inventors
- 👤 K Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:17
CPC Classifications
B; B24; B24D; B24D7/00; B24D7/16
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |