US2441455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door closing device
Assignee: Individual
•
Filing: 1944-10-30
•
Granted: 1948-05-11
•
Expires: 1964-10-30
Abstract
No abstract record available.
Inventors
- 👤 Fred W Tetzman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |