US2426145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chronometric recorder
Assignee: SERDEX Inc
•
Filing: 1946-03-30
•
Granted: 1947-08-19
•
Expires: 1966-03-30
Abstract
No abstract record available.
Inventors
- 👤 Coburn William Knowlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:51
CPC Classifications
G; G01; G01W; G01W1/00; G01W1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1747839A
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US2250509A
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US2313466A
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US2374653A
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US2340279A
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US2289080A
Cited
US2354086A
Cited
US2304702A
Cited
US2350008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |