US2586797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire protection system
Assignee: Otis Elevator Co
•
Filing: 1947-06-21
•
Granted: 1952-02-26
•
Expires: 1967-06-21
Abstract
No abstract record available.
Inventors
- 👤 Dunlop James
- 👤 Durang Edwin Forrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:04
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/009; B; B66; B66B; B66B5/00; B66B5/02; B66B5/021; B66B5/024; F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F11/00; F24F11/30; F24F11/32; F24F11/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2073744A
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US2087637A
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GB481991A
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US2222365A
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US2299833A
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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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |