US3034077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic delay lines
Assignee: AT&T Inc
•
Filing: 1959-04-02
•
Granted: 1962-05-08
•
Expires: 1979-04-02
Abstract
No abstract record available.
Inventors
- 👤 Ernest R Kretzmer
- 👤 Mark A Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:23
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2571019A
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US2619604A
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US2797410A
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US2709243A
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US2846666A
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US2800633A
Cited
US2814793A
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US2753529A
Cited
US2905909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |