US2935565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic signalling and ranging apparatus for marine use
Assignee: RADIO IND CORP
•
Filing: 1954-02-26
•
Granted: 1960-05-03
•
Expires: 1974-02-26
Abstract
No abstract record available.
Inventors
- 👤 Dorothy C Macadam
- 👤 Walter S Lemmon
- 👤 Stephen S Stefanowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:53
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72; Y; Y10; Y10S; Y10S367/00; Y10S367/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US299968A
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US1340955A
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US1731905A
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US1728239A
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US1973673A
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US2666192A
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US2545478A
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US2547854A
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US2759783A
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US2802055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |