US2863075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic transducer
Assignee: Individual
•
Filing: 1953-12-15
•
Granted: 1958-12-02
•
Expires: 1973-12-15
Abstract
No abstract record available.
Inventors
- 👤 Francis J Fry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:16
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/30; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0651
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2430013A
Cited
US2477246A
Cited
US2484014A
Cited
US2592703A
Cited
GB668343A
Cited
US2496293A
Cited
US2626992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |