Patent US3402491A successfully refreshed from Google Patents.
US3402491A
Expired / Lapsed
US
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Portable visual display device
Assignee: XICOM Inc
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Filing: 1968-02-09
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Granted: 1968-09-24
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Expires: 1988-02-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:30
CPC Classifications
G; G09; G09F; G09F27/00; G09F13/00; G09F13/04; G09F5/00; G09F5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA693371A
Cited
US2646636A
Cited
US2821037A
Cited
FR1142655A
Cited
US3089923A
Cited
US3030848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |