US3671238A
Expired / Lapsed
US
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High contrast image development method and article
Assignee: Raytheon Co
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Filing: 1970-09-10
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Granted: 1972-06-20
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Expires: 1990-09-10
Abstract
Abstract METHODS FOR IMPROVING THE CONTRAST OF IMAGES FORMED BY DEPOSITING METAL VAPOR ATOMS ON ACTINIC RAY IMAGEWISE-EXPOSED NUCLEATED SURFACES OF NUCELATION RECORDING MEDIUM AND ARTICLE PRODUCED THEREBY. OPTICAL DENSITIES OF OVER 2.0 ARE OBTAINED BY SUITABLE MODERATION OF THE THERMAL ENERGY OF THE VAPOR ATOMS SUCH THAT THE ATOMS FORM AN AMORPHOUS IMAGE FILM WHICH EXHIBITS LOW SPECULAR REFLECTANCE. MODERATION IS ACHIEVED BY USE OF LOW TEMPERATURE AND/OR LARGE AREA VAPOR SOURCES, CHEMICAL INTERACTIONS WITH THE SOUCE OR ENERGY EXCHANGE BETWEEN THE VAPOR ATOMS AND SECONDARY GASES OR WALL SURFACES WITHING THE DEVELOPING CHAMBER.
Inventors
- 👤 Alfred F Kaspaul
- 👤 Erika E Kaspaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:44
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; C; C23; C23C; C23C14/00; C23C14/04; C23C14/048; C23C14/22; C23C14/24; G03C1/705
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |