US2579772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an image storage screen
Assignee: Unisys Corp
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Filing: 1949-10-17
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Granted: 1951-12-25
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Expires: 1969-10-17
Abstract
No abstract record available.
Inventors
- 👤 Marshall P Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:43
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/58; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
THE METHOD OF MAKING AN AIMAGE STORAGE SCREEN WHICH INCLUDES THE FOLLOWING STEPS; COATING ONE SIDE OF THE METAL PORTIONS OF A METALLIC SCREEN WITH A THIN FILM OF ANTIMONY, DEPOSITING A CONTINOUS FILM OF NITROCELLULOSE ONTO THE ANTIMONY SIDE OF THE SCREEN, DEPOSITING A RESINFORCING FILM OF ALUMINUM ON THE NITROCELLULOSE, APPLYING A CONTINOUS FILM OF A NON-CONDUCTING SUBSTANCE TO THE SCREEN AND THE NITROCELLULOSE FILM, REMOVING THE ALUMINUM AND NITROCELLULOSE FILMS BY WASHING IN A SOLUTION OF SODIUM HYDROXIDE AND WATER, PLACING THE SCREEN IN A CONTAINER, REDUCING THE PRESSURE THEREIN, HEATING CESIUM TO EVAPORATE IT AND DEPOSIT IT ON THE ANTIMONY SIDE OF THE SCREEN TO PROVIDE A THIN PHOTOSENSITIVE SURFACE, AND RAISING THE TEMPERATURE OF THE SCREEN TO FORM DISCRETE CESIUM DROPS ON THE NON-CONDUCTING SURFACE.
Claim 2
Independent Claim
130 words
THE METHOD OF MAKING AN AIMAGE STORAGE SCREEN WHICH INCLUDES THE FOLLOWING STEPS; COATING ONE SIDE OF THE METAL PORTIONS OF A METALLIC SCREEN WITH A THIN FILM OF ANTIMONY, DEPOSITING A CONTINOUS FILM OF NITROCELLULOSE ONTO THE ANTIMONY SIDE OF THE SCREEN, DEPOSITING A RESINFORCING FILM OF ALUMINUM ON THE NITROCELLULOSE, APPLYING A CONTINOUS FILM OF A NON-CONDUCTING SUBSTANCE TO THE SCREEN AND THE NITROCELLULOSE FILM, REMOVING THE ALUMINUM AND NITROCELLULOSE FILMS BY WASHING IN A SOLUTION OF SODIUM HYDROXIDE AND WATER, PLACING THE SCREEN IN A CONTAINER, REDUCING THE PRESSURE THEREIN, HEATING CESIUM TO EVAPORATE IT AND DEPOSIT IT ON THE ANTIMONY SIDE OF THE SCREEN TO PROVIDE A THIN PHOTOSENSITIVE SURFACE, AND RAISING THE TEMPERATURE OF THE SCREEN TO FORM DISCRETE CESIUM DROPS ON THE NON-CONDUCTING SURFACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |