Patent US2402309A successfully refreshed from Google Patents.
US2402309A
Expired / Lapsed
US
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Hasp lock keeper
Assignee: Harrisburg University of Science and Technology
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Filing: 1944-09-07
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Granted: 1946-06-18
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Expires: 1964-09-07
Abstract
No abstract record available.
Inventors
- 👤 Robert S Wagner
- 👤 Berthold R Thiele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:22
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/48; E05B65/50; Y; Y10; Y10T; Y10T292/00; Y10T292/68
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) | 1949-06-17 | 1949-12-17 | 1950-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-06-17 | 1953-12-17 | 1954-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-06-17 | 1957-12-17 | 1958-06-18 | $7700.00 | Window Closed / Lapsed |