US3564461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making an ultrasonic delay cell
Assignee: United States Department of the Navy
•
Filing: 1968-11-04
•
Granted: 1971-02-16
•
Expires: 1988-11-04
Abstract
Abstract A PROCESS FOR MAKING AN ULTRASONIC DELAY CELL WHEREIN A QUARTZ ROD IS NOTCHED AT EACH END HALFWAY ALONG ITS OPTICAL PATH. FIRST AND SECOND ULTRASONIC TRANSDUCERS ARE MOUNTED AT OPPOSITE ENDS OF THE ROD SO THAT ONE ACOUSTIC BEAM IS BEHIND THE OTHER IN THE OPTICAL PATH. PROTECTIVE SHIELDS ARE INSERTED INTO THE NOTCHES TO PREVENT DAMAGE TO THE TRANSDUCERS AS THE PORTION OF THE END OF THE ROD OPPOSITE EACH TRANSDUCER IS SANDBLASTED TO TERMINATE EACH ACOUSTIC BEAM.
Inventors
- 👤 James L Jernigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:16
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |