US2873073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape recorder and transcriber drive system
Assignee: North American Aviation Corp
•
Filing: 1952-10-18
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Granted: 1959-02-10
•
Expires: 1972-10-18
Abstract
No abstract record available.
Inventors
- 👤 John P Lekas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:03
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/093; G11B15/00; G11B15/18; G11B15/1883; G11B15/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2592652A
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US2706638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |