Patent US3517343A successfully refreshed from Google Patents.
US3517343A
Expired / Lapsed
US
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High-frequency acoustic delay line
Assignee: Singer Co
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Filing: 1966-06-10
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Granted: 1970-06-23
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Expires: 1986-06-10
Abstract
No abstract record available.
Inventors
- 👤 William H Crim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:13
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/043; H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2797410A
Cited
US2815490A
Cited
US2718637A
Cited
US2837721A
Cited
GB823549A
Cited
FR1362895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |