US3426339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information storage and playback system
Assignee: RICH ENG Inc
•
Filing: 1965-10-24
•
Granted: 1969-02-04
•
Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Rich
- 👤 John S Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:21
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/08; G09B5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2435879A
Cited
US3200516A
Cited
US3199226A
Cited
US3166859A
Cited
US3286273A
Cited
US3315242A
Cited
US3269033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |