US2611249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selector control system
Assignee: Emsco Derrick and Equipment Co
•
Filing: 1949-11-14
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Granted: 1952-09-23
•
Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Albert A Ashton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:59
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H63/00; F16H63/02; F16H63/30; F16H63/34; F16H63/36; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/3056; F15B2211/30585; F15B2211/3059; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7055; F15B2211/71; F15B2211/7107; F15B2211/72; F16H2708/00; F16H2708/02; F16H2708/06; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19433
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US941426A
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US882091A
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US1914255A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |