US2445304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual vibrating reed stroboscope
Assignee: United States Department of the Navy
•
Filing: 1945-01-05
•
Granted: 1948-07-13
•
Expires: 1965-01-05
Abstract
No abstract record available.
Inventors
- 👤 William J Grace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:40
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/02; G01P3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US817555A
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US975949A
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US1215135A
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US1208488A
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US1416550A
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US1566124A
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US1807149A
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US2303234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |