Patent US2575651A successfully refreshed from Google Patents.
US2575651A
Expired / Lapsed
US
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Locking device
Assignee: Harvard Manufacturing Co
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Filing: 1949-05-03
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Granted: 1951-11-20
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Expires: 1969-05-03
Abstract
No abstract record available.
Inventors
- 👤 Blanke Nathan Eugene
- 👤 Hillard J Sands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:22
CPC Classifications
A; A47; A47C; A47C19/00; A47C19/02; A47C19/021; A47C19/024; F; F16; F16B; F16B12/00; F16B12/44; F16B12/52; F16B12/54; F16B12/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1566709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |