US3561168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine
Assignee: Heald Machine Co
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Filing: 1968-04-12
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Granted: 1971-02-09
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Expires: 1988-04-12
Abstract
Abstract THIS INVENTION RELATES TO A GRINDING MACHINE AND, MORE PARTICULARLY, TO APPARATUS HAVING A GRINDING CYCLE REGULATED BY THE USE OF ELECTRICAL PULSES, THE PULSES SERVING TO REGULATE NOT ONLY THE CROSS-FEED POSITION, BUT ALSO OPERATE A VISUAL READOUT OF THAT POSITION.
Inventors
- 👤 Edward G Robillard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:22
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/10; B23; B23Q; B23Q15/00
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |