Patent JPS631072A successfully refreshed from Google Patents.
Patent US2413847A successfully refreshed from Google Patents.
US2413847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computing instrument
Assignee: Ford Instrument Co Inc
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Filing: 1932-03-31
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Granted: 1947-01-07
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Expires: 1952-03-31
Abstract
No abstract record available.
Inventors
- 👤 Elliott P Ross
- 👤 Harry S Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:44
CPC Classifications
F; F41; F41G; F41G11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-01-06 | 1950-07-08 | 1951-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-01-06 | 1954-07-08 | 1955-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-01-06 | 1958-07-08 | 1959-01-07 | $7700.00 | Window Closed / Lapsed |