Patent US2560477A successfully refreshed from Google Patents.
US2560477A
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Door lock control
Assignee: ROETHEL ENGINEERING Corp
•
Filing: 1944-10-26
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Granted: 1951-07-10
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Expires: 1964-10-26
Abstract
No abstract record available.
Inventors
- 👤 John H Roethel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:39
CPC Classifications
E; E05; E05B; E05B1/00; E05B1/0038; Y; Y10; Y10S; Y10S292/00; Y10S292/23; Y10S292/37; Y10T; Y10T292/00; Y10T292/57
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |