Patent US2692736A successfully refreshed from Google Patents.
US2692736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape guide for production of magnetic sound tape
Assignee: Audio Devices Inc
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Filing: 1950-12-21
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Granted: 1954-10-26
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Expires: 1970-12-21
Abstract
No abstract record available.
Inventors
- 👤 John A Hanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:29
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/60; G11B5/00; G11B5/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1602447A
Cited
US1958692A
Cited
US2060269A
Cited
US2031430A
Cited
US2194879A
Cited
US2358654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |