Patent US2934756A successfully refreshed from Google Patents.
US2934756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus responsive to changes in transit time of a wave-energy signal
Assignee: Individual
•
Filing: 1956-06-01
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Granted: 1960-04-26
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Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Henry P Kalmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/36; G01K; G01K11/00; G01K11/22; G01K11/24; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2517549A
Cited
US2705320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |