US2709760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable angle ultrasonic search unit
Assignee: Sperry Products Inc
•
Filing: 1952-03-14
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Granted: 1955-05-31
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Expires: 1972-03-14
Abstract
No abstract record available.
Inventors
- 👤 Howard E Van Valkenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:21
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/221; G01N29/26; G01N29/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |