US2580593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door check and hold open
Assignee: Motors Liquidation Co
•
Filing: 1949-06-17
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Granted: 1952-01-01
•
Expires: 1969-06-17
Abstract
No abstract record available.
Inventors
- 👤 Nelson E Putnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:24
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1207; E05D; E05D11/00; E05D11/10; E05D11/1014; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/531; Y; Y10; Y10S; Y10S16/00; Y10S16/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23191E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |