Patent US2997689A successfully refreshed from Google Patents.
US2997689A
Expired / Lapsed
US
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Distance measuring apparatus
Assignee: Individual
•
Filing: 1946-03-26
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Granted: 1961-08-22
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Expires: 1966-03-26
Abstract
No abstract record available.
Inventors
- 👤 Ford L Johnson
- 👤 Fred M Mayes
- 👤 Jack W Jones
- 👤 Byron F Murphey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:22
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/52004; G01S7/52006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1853119A
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US1858931A
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US1885652A
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US2447333A
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US2055883A
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US2131993A
Cited
US2312934A
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US2284654A
Cited
US2371988A
Cited
US2460316A
Cited
US2446937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |