US3057188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic mechanical impedance measuring device
Assignee: Sperry Products Inc
•
Filing: 1958-10-30
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Granted: 1962-10-09
•
Expires: 1978-10-30
Abstract
No abstract record available.
Inventors
- 👤 Elliott A Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:22
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/12; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02827
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) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |