US2581969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator car switch
Assignee: ELEVATOR SUPPLIES CO Inc
•
Filing: 1947-12-31
•
Granted: 1952-01-08
•
Expires: 1967-12-31
Abstract
No abstract record available.
Inventors
- 👤 Carroll E Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:40
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/36; B66B1/38; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18088; Y10T74/18096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US585915A
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US771989A
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US771344A
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DE484740C
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FR792736A
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US2140354A
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US2252245A
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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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |