US3497223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording apparatus with plural independent record-reproduce devices
Assignee: RCA Corp
•
Filing: 1967-01-30
•
Granted: 1970-02-24
•
Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 William R Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:09
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US661619A
Cited
US882329A
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US2573303A
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US2880279A
Cited
US2857476A
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US2920147A
Cited
US2991448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |