US2621539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam construction for use in timers
Assignee: FAIRMONT RAILWAY MOTORS Inc
•
Filing: 1950-05-31
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Granted: 1952-12-16
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Expires: 1970-05-31
Abstract
No abstract record available.
Inventors
- 👤 Irving N Eustis
- 👤 Neil J Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/02; F16H53/025; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876; Y10T29/53; Y10T29/53613; Y10T74/00; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US329904A
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US855773A
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US1803326A
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US1701522A
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US1780856A
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US1815134A
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US2163864A
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US2569096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |