US2502712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical tachometer
Assignee: METRON INSTR Co
•
Filing: 1945-02-01
•
Granted: 1950-04-04
•
Expires: 1965-02-01
Abstract
No abstract record available.
Inventors
- 👤 Floyd Frederick Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:48
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1665857A
Cited
US1779783A
Cited
FR627819A
Cited
US2068147A
Cited
US2260933A
Cited
US2337328A
Cited
US2314874A
Cited
GB557248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |