US2650846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door control mechanism
Assignee: RUDOLPH I SCHONITZER
•
Filing: 1949-10-20
•
Granted: 1953-09-01
•
Expires: 1969-10-20
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:44
CPC Classifications
E; E05; E05B; E05B85/00; E05B85/20; E05B85/24; E05B85/243; Y; Y10; Y10S; Y10S292/00; Y10S292/24; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1044; Y10T292/1045; Y10T292/1047; Y10T292/1062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US917664A
Cited
US1269467A
Cited
US1221932A
Cited
US2094413A
Cited
US2146379A
Cited
US2560477A
Cited
US2480688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |