Patent US2972142A successfully refreshed from Google Patents.
US2972142A
Expired / Lapsed
US
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Method and apparatus for measuring the velocity of a projectile
Assignee: Individual
•
Filing: 1944-03-07
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Granted: 1961-02-14
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Expires: 1964-03-07
Abstract
No abstract record available.
Inventors
- 👤 William C Parkinson
- 👤 Elmore R Chatham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:07
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1801466A
Cited
US1981884A
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US2116717A
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US2133615A
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US2134716A
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US2423023A
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US2402464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |