US3474314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contactless electromagnetic driving devices
Assignee: Kokusai Display Kogyo Co Ltd
•
Filing: 1967-12-06
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Granted: 1969-10-21
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Expires: 1987-12-06
Abstract
No abstract record available.
Inventors
- 👤 Reijiro Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:35
CPC Classifications
G; G09; G09F; G09F11/00; G09F11/30; G09F11/34; G09F19/00; G09F19/02; G09F19/08; H; H02; H02K; H02K33/00; H02K33/02; H02K33/10; G09F2019/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2945168A
Cited
US3122690A
Cited
US3215916A
Cited
US3332229A
Cited
US3400316A
Cited
US3359473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |