US2920180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroerosive grinding method and device for its performance
Assignee: AGIE A G fur IND ELEKTRONEK
•
Filing: 1958-03-17
•
Granted: 1960-01-05
•
Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Ullmann Werner
- 👤 Ehrlich Willibald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:50
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/04; B23H7/00; B23H7/22; B23H9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2794110A
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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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |