US2593837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor and brake control
Assignee: Ernst Leitz Wetzlar GmbH
•
Filing: 1950-07-06
•
Granted: 1952-04-22
•
Expires: 1970-07-06
Abstract
No abstract record available.
Inventors
- 👤 Broschke Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:40
CPC Classifications
B; B44; B44B; B44B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2221577A
Cited
US2061487A
Cited
US2257610A
Cited
US2233798A
Cited
US2387215A
Cited
US2404153A
Cited
US2475329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |