US3734737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing chromatic color screen
Assignee: Polaroid Corp
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Filing: 1971-11-16
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Granted: 1973-05-22
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Expires: 1991-11-16
Abstract
Abstract A COLOR SCREEN IS PRODUCED BY EXPOSING, EITHER SUCCESSIVELY OR SIMULTANEOUSLY, A PLURALITY OF PHOTOSENSIVE LAYERS TO SHORT DURATION, HIGH INTENSITY RADIATION ACTINIC TO EACH LAYER. THE RADIATION IS IN A PATTERN SUCH THAT AN ALIQUOT PART OF EACH LAYER IS EXPOSED. THE LAYER IS DYED WITH A SELECTED COLOR. THE EXPOSED AREAS ARE IN SIDE-BYSIDE REGISTRATION ON A TRANSPARENT BACKING AND FORM A MULTICOLOR SCREEN OR GENERAL UTILITY IN THE PHOTOGRAHIC ARTS.
Inventors
- 👤 J Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/30; G03F; G03F7/00; G03F7/0005; G03F7/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |