Patent US3003239A successfully refreshed from Google Patents.
US3003239A
Expired / Lapsed
US
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Method and apparatus for measuring lengths by means of sound waves
Assignee: Individual
•
Filing: 1956-02-21
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Granted: 1961-10-10
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Expires: 1976-02-21
Abstract
No abstract record available.
Inventors
- 👤 Weidner Karl Benno
- 👤 Jaenicke Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
G; G01; G01B; G01B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2275977A
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US2300803A
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US2394461A
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US2394455A
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GB601961A
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US2401094A
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US2506141A
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US2680837A
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US2768701A
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US2758663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |