Patent US2276580A successfully refreshed from Google Patents.
US2276580A
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Assignee: Individual
•
Filing: 1940-01-02
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Granted: 1942-03-17
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Expires: 1960-01-02
Abstract
No abstract record available.
Inventors
- 👤 David L Hofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:59
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/38; G01F1/383; G01P; G01P5/00; G01P5/14
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) | 1945-03-16 | 1945-09-15 | 1946-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-16 | 1949-09-15 | 1950-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-16 | 1953-09-15 | 1954-03-17 | $7700.00 | Window Closed / Lapsed |