US3720804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-d electrode machining tool
Assignee: PROD MACHINE CO
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Filing: 1971-12-23
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Granted: 1973-03-13
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Expires: 1991-12-23
Abstract
Abstract A CONTOUR-FOLLOWING APPARATUS HAS A FIRST FRAME WHICH IS MOVABLE HORIZONTALLY, A SECOND FRAME MOVABLE VERTICALLY ON THE FIRST FRAME, AND A THIRD FRAME ATTACHED TO THE SECOND FRAME AND PIVOTALLY MOVABLE IN A HORIZONTAL PLANE. A TRACER AND A CUTTER ARE MOUNTED ON THE THIRD FRAME WITH EACH BEING INDIVIDUALLY PIVOTABLY ADJUSTABLE.
Inventors
- 👤 F Kriz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:48
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/26; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/54; B23Q1/545; B23Q1/5462; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/102
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |