US3420967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc recording and reproducing system
Assignee: CBS Broadcasting Inc
•
Filing: 1963-07-01
•
Granted: 1969-01-07
•
Expires: 1983-07-01
Abstract
No abstract record available.
Inventors
- 👤 Peter C Goldmark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:37
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563565A
Cited
US2921992A
Cited
US2932522A
Cited
US3025066A
Cited
US3072753A
Cited
US3111635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |