US2949769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-balancing ultrasonic instrument
Assignee: Curtiss Wright Corp
•
Filing: 1956-01-20
•
Granted: 1960-08-23
•
Expires: 1976-01-20
Abstract
No abstract record available.
Inventors
- 👤 Robert B Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:37
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2476496A
Cited
US2527208A
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US2823351A
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US2612772A
Cited
US2622192A
Cited
DE865995C
Cited
US2768524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |