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US3532850A
Expired / Lapsed
US
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Power supply for electrical discharge machining
Assignee: Amsted Industries Inc
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Filing: 1966-07-27
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Granted: 1970-10-06
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Expires: 1986-07-27
Abstract
No abstract record available.
Inventors
- 👤 Hans J Schulz
- 👤 Victor H Marcolini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:21
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/022; B23H2300/00; B23H2300/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3052817A
Cited
US3292040A
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US3158728A
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US3243567A
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US3246113A
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US3399288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |