Patent US4883764A successfully refreshed from Google Patents.
US3331920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color information display and optical means
Assignee: Westinghouse Electric Corp
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Filing: 1965-06-02
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Granted: 1967-07-18
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Expires: 1985-06-02
Abstract
No abstract record available.
Inventors
- 👤 Carl W Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/12; G09F19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A COLOR INFORMATION DISPLAY SYSTEM INCLUDING, A SOURCE OF PRIMARY COLORS ADAPTED TO TRAVERSE AN OPTICAL PATH FOR PROJECTION ON A VIEWING SCREEN, DICHROIC MEANS IN SAID OPTICAL PATH FOR SELECTIVELY TRANSMITTING ONE OF SAID PRIMARY COLORS ALONG SAID OPTICAL PATH AND REFLECTING THE REMAINING PRIMARY COLORS, A VARIABLE INDICIA RELATED REFLECTING PLANE RECEIVING THE SAID REFLECTED PRIMARY COLORS
Claim 2
Dependent Claim
59 words
A COLOR INFORMATION DISPLAY SYSTEM INCLUDING, A SOURCE OF PRIMARY COLORS ADAPTED TO TRAVERSE AN OPTICAL PATH FOR PROJECTION ON A VIEWING SCREEN, DICHROIC MEANS IN SAID OPTICAL PATH FOR SELECTIVELY TRANSMITTING ONE OF SAID PRIMARY COLORS ALONG SAID OPTICAL PATH AND REFLECTING THE REMAINING PRIMARY COLORS, A VARIABLE INDICIA RELATED REFLECTING PLANE RECEIVING THE SAID REFLECTED PRIMARY COLORS
References Cited (Backward Citations)
US2645976A
Cited
US3215030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |