US2304556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door control apparatus
Assignee: Individual
•
Filing: 1940-02-20
•
Granted: 1942-12-08
•
Expires: 1960-02-20
Abstract
No abstract record available.
Inventors
- 👤 Andrew C Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:23
CPC Classifications
E; E05; E05F; E05F5/00; E05F5/02; E05F5/027; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/47; E05Y2201/488; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0876; Y10T292/0883; Y10T292/0884
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) | 1945-12-07 | 1946-06-08 | 1946-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-07 | 1950-06-08 | 1950-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-07 | 1954-06-08 | 1954-12-08 | $7700.00 | Window Closed / Lapsed |