US2790643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape recording and play-back machine
Assignee: FORT PITT IND Inc
•
Filing: 1951-03-31
•
Granted: 1957-04-30
•
Expires: 1971-03-31
Abstract
No abstract record available.
Inventors
- 👤 Andrew A Gedde
- 👤 John S Moyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:24
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29; G11B15/44; G11B15/442
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |