Patent US2645924A successfully refreshed from Google Patents.
US2645924A
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Lock and bolt operating mechanism for psychiatric screens
Assignee: Detroit Steel Products Co Inc
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Filing: 1950-07-24
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Granted: 1953-07-21
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Expires: 1970-07-24
Abstract
No abstract record available.
Inventors
- 👤 Clyde W Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:48
CPC Classifications
E; E05; E05C; E05C9/00; E05C9/02; E05C9/021; E05C9/18; E05C9/1825; E05C9/1833; E05C9/1841; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0834; Y10T292/0836; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5097; Y10T70/5111; Y10T70/5115; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/5385; Y10T70/5531
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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |