US1946970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door and operating means therefor
Assignee: D DOUGLAS DEMAREST
•
Filing: 1932-02-10
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Granted: 1934-02-13
•
Expires: 1952-02-10
Abstract
No abstract record available.
Inventors
- 👤 Grandgent Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:20
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/40; E05D15/403; E05D13/00; E05D13/10; E05D13/14; E05D13/145; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106
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) | 1937-02-12 | 1937-08-14 | 1938-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-12 | 1941-08-14 | 1942-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-12 | 1945-08-14 | 1946-02-13 | $7700.00 | Window Closed / Lapsed |