Patent US2074449A successfully refreshed from Google Patents.
US2074449A
Expired / Lapsed
US
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Locking mechanism
Assignee: Individual
•
Filing: 1933-12-29
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Granted: 1937-03-23
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Expires: 1953-12-29
Abstract
No abstract record available.
Inventors
- 👤 Ziomek Peter
- 👤 Kowalski Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:58
CPC Classifications
E; E05; E05B; E05B77/00; E05B77/46; Y; Y10; Y10S; Y10S292/00; Y10S292/03; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0848; Y10T292/0849; Y10T292/0853; Y10T292/0859; Y10T70/00; Y10T70/60; Y10T70/625; Y10T70/65
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-03-22 | 1940-09-21 | 1941-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-22 | 1944-09-21 | 1945-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-22 | 1948-09-21 | 1949-03-23 | $7700.00 | Window Closed / Lapsed |