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Patent US3423993A successfully refreshed from Google Patents.
US3423993A
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US
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Rolling ultrasonic transducer
Assignee: Parametrics Inc
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Filing: 1966-07-20
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Granted: 1969-01-28
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Expires: 1986-07-20
Abstract
No abstract record available.
Inventors
- 👤 Lawrence C Lynnworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:05
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/02; G01; G01N; G01N29/00; G01N29/22; G01N29/24; G01N29/2493; G01N29/28; G01N2291/00; G01N2291/02; G01N2291/025; G01N2291/0251; G01N2291/04; G01N2291/042; G01N2291/0421; G01N2291/0422; G01N2291/10; G01N2291/106; G01N2291/26; G01N2291/263; G01N2291/2632
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) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |