Patent US2629246A successfully refreshed from Google Patents.
US2629246A
Expired / Lapsed
US
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Safety door latch
Assignee: ALTA ENGINEERING Co
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Filing: 1949-03-07
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Granted: 1953-02-24
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Expires: 1969-03-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Schumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:17
CPC Classifications
E; E05; E05B; E05B85/00; E05B85/08; Y; Y10; Y10S; Y10S292/00; Y10S292/65; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1014; Y10T292/1022; Y10T292/1024; Y10T70/00; Y10T70/50; Y10T70/5611; Y10T70/5642; Y10T70/5757; Y10T70/5765; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/2063
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) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |