Patent US3243567A successfully refreshed from Google Patents.
US3243567A
Expired / Lapsed
US
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Electrical discharge maching apparatus
Assignee: Elox Corporation of Michigan
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Filing: 1965-03-01
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Granted: 1966-03-29
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Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Lobur Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:53
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/022
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
IN AN APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY AN INTERMITTENT ELECTRICAL DISCHARGE ACROSS A DIELECTRIC FILLED GAP BETWEEN THE WORKPIECE AND AN ELECTRODE TOOL, A POWER SOURCE, AN ELECTRONIC SWICTH OPERATIVELY CONNECTED TO SAID SOURCE AND SAID GAP FOR PROVIDING MACHINING PULSES THERETO, A MULTIVIBRATOR CONNECTED IN CIRCUIT WITH SAID SWITCH FOR CONTROLLING ITS OPERATION AND INCLUDING A PAIR OF ELECTRONIC SWITCHING MEANS, EACH HAVING ITS CONTROL ELECTRODE CONNECTED TO A DIFFERENT RESISTORCAPACITOR NETWORK, MEANS FOR SIMULTANEOUSLY VARYING THE
References Cited (Backward Citations)
US129085A
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US1362844A
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US2835785A
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US2966574A
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US3020448A
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US3120619A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |