US3027540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophone with spaced electromechanical ceramic elements
Assignee: Gulton Industries Inc
•
Filing: 1957-09-23
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Granted: 1962-03-27
•
Expires: 1977-09-23
Abstract
No abstract record available.
Inventors
- 👤 Glenn N Howatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2480535A
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US2486146A
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US2618698A
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US2804603A
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US2761077A
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US2749532A
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US2762032A
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US2837731A
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US2880404A
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US2848672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |