US2761050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and a feed drive for the regulation of the spark gap in metalworking machines
Assignee: Deutsche Edelstahlwerke AG
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Filing: 1953-09-29
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Granted: 1956-08-28
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Expires: 1973-09-29
Abstract
No abstract record available.
Inventors
- 👤 Ballhausen Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/14; B23H7/18; C; C09; C09B; C09B5/00; C09B5/02; C09B5/04; C09B5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2402922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |