US2740289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic scanning and recording device for ultrasonic inspection of materials
Assignee: Sperry Products Inc
•
Filing: 1953-03-20
•
Granted: 1956-04-03
•
Expires: 1973-03-20
Abstract
No abstract record available.
Inventors
- 👤 Howard E Van Valkenburg
- 👤 Edward G Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:38
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/06; G01N29/0609; G01N29/0618; G01N29/0636
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2592134A
Cited
US2527986A
Cited
GB685275A
Cited
US2628335A
Cited
US2693105A
Cited
US2660054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |