US2859415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic acoustic wave transmission delay lines
Assignee: AT&T Inc
•
Filing: 1952-09-03
•
Granted: 1958-11-04
•
Expires: 1972-09-03
Abstract
No abstract record available.
Inventors
- 👤 Morton D Fagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:59
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36; H03H9/02; H03H9/125; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005; Y10T29/49016; Y10T74/00; Y10T74/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2387772A
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US2274444A
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US2308606A
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US2432657A
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US2577600A
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US2505515A
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US2624804A
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US2672590A
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US2671746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |