US2927284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple path ultrasonic delay line
Assignee: Individual
•
Filing: 1958-07-18
•
Granted: 1960-03-01
•
Expires: 1978-07-18
Abstract
No abstract record available.
Inventors
- 👤 Edsel A Worrell
- 👤 Leigh L Kimball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:12
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2465993A
Cited
US2503165A
Cited
US2505515A
Cited
US2612814A
Cited
US2845710A
Cited
US2664547A
Cited
US2672590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |