US3697403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical grinding apparatus
Assignee: Hammond Machinery Builders Inc
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Filing: 1968-11-07
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Granted: 1972-10-10
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Expires: 1988-11-07
Abstract
Abstract A PROCESS AND APPARATUS FOR AUTOMATICALLY SEARCHING FOR, ESTABLISHING AND MAINTAINING ONE OR MORE SELECTED PERFORMACE PARAMETERS IN AN ELECTROCHEMICAL GRINDING OPERATION.
Inventors
- 👤 Lester V Colwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:44
CPC Classifications
B; B23; B23H; B23H3/00; B23H3/02; B23H5/00; B23H5/06; B23H5/08
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |