US2996687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable ultrasonic delay line
Assignee: Andersen Laboratories Inc
•
Filing: 1959-08-26
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Granted: 1961-08-15
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Expires: 1979-08-26
Abstract
No abstract record available.
Inventors
- 👤 Holden P Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:55
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2552489A
Cited
US2437067A
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US2753528A
Cited
US2768356A
Cited
US2659053A
Cited
US2781494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |