Patent US2488944A successfully refreshed from Google Patents.
US2488944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door structure
Assignee: Individual
•
Filing: 1945-08-03
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Granted: 1949-11-22
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Expires: 1965-08-03
Abstract
No abstract record available.
Inventors
- 👤 Sylvan Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:33
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/02
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) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |