US2947889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical transducer system
Assignee: GEN ULTRASONICS Co
•
Filing: 1956-08-27
•
Granted: 1960-08-02
•
Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Stanley R Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; B06B1/0618
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19063E
Cited
GB145691A
Cited
US1751359A
Cited
US1872304A
Cited
US2454264A
Cited
US2534276A
Cited
US2435031A
Cited
US2704333A
Cited
US2714672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |