US2366587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic door operating device
Assignee: —
•
Filing: —
•
Granted: 1945-01-02
•
Expires: 1962-01-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/261; B; B60; B60J; B60J5/00; B60J5/04; B60J5/0497; Y; Y10; Y10S; Y10S56/00; Y10S56/11
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) | 1948-01-02 | 1948-07-03 | 1949-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-01-02 | 1952-07-03 | 1953-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-01-02 | 1956-07-03 | 1957-01-02 | $7700.00 | Window Closed / Lapsed |