US3256733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic pulse-echo apparatus for internal exploration
Assignee: Air Shields Inc
•
Filing: 1963-02-06
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Granted: 1966-06-21
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Expires: 1983-02-06
Abstract
No abstract record available.
Inventors
- 👤 Carlin Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:16
CPC Classifications
A; A61; A61B; A61B8/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR997046A
Cited
US3086390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |