US2567430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston position indicator
Assignee: Individual
•
Filing: 1945-02-03
•
Granted: 1951-09-11
•
Expires: 1965-02-03
Abstract
No abstract record available.
Inventors
- 👤 Francis F Griffiths
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:22
CPC Classifications
G; G01; G01M; G01M15/00; G01M15/04; G01M15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US490725A
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US942497A
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US1421501A
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GB136781A
Cited
US1742229A
Cited
US1541750A
Cited
US1782142A
Cited
US2361462A
Cited
US2386179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |