US2956875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic process for making stencil screens
Assignee: RCA Corp
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Filing: 1958-09-26
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Granted: 1960-10-18
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Expires: 1978-09-26
Abstract
No abstract record available.
Inventors
- 👤 Russell R Ulary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:56
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/68; G03G; G03G13/00; G03G13/14; G03G13/16; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS COMPRISING ELECTROPHOTOGRAPHICALLY PRODUCING A LOOSE POWDER IMAGE OF A PREDETERMINED CONFIGURATION ON AN ELECTROPHOTOGRAPHIC RECORDING MEMBER, TRANSFERRING SAID POWDER IMAGE TO A SURFACE OF A PHOTOHARDENABLE COMPOSITION BY BRINGING SAID RECORDING MEMBER AND SAID SURFACE INTO CONTACT WITH EACH, EXPOSING SAID PHOTOHARDENABLE COMPOSITION WITH SAID POWDER IMAGE THEREON TO LIGHT WITHIN THE SPECTRAL SENSITIVITY OF SAID PHOTOHARDENABLE COMPOSITION AND WITHIN THE SPECTRAL RANGE TO WHICH THE POWDER IMAGE IS OPAQUE, AND REMOVING UNHARDENED PORTIONS OF SAID PHOTOHARDENABLE COMPOSITION ALONG WITH SAID POWDER IMAGE TO LEAVE A PATTERN OF
Claim 2
Dependent Claim
90 words
A PROCESS COMPRISING ELECTROPHOTOGRAPHICALLY PRODUCING A LOOSE POWDER IMAGE OF A PREDETERMINED CONFIGURATION ON AN ELECTROPHOTOGRAPHIC RECORDING MEMBER, TRANSFERRING SAID POWDER IMAGE TO A SURFACE OF A PHOTOHARDENABLE COMPOSITION BY BRINGING SAID RECORDING MEMBER AND SAID SURFACE INTO CONTACT WITH EACH, EXPOSING SAID PHOTOHARDENABLE COMPOSITION WITH SAID POWDER IMAGE THEREON TO LIGHT WITHIN THE SPECTRAL SENSITIVITY OF SAID PHOTOHARDENABLE COMPOSITION AND WITHIN THE SPECTRAL RANGE TO WHICH THE POWDER IMAGE IS OPAQUE, AND REMOVING UNHARDENED PORTIONS OF SAID PHOTOHARDENABLE COMPOSITION ALONG WITH SAID POWDER IMAGE TO LEAVE A PATTERN OF
References Cited (Backward Citations)
US2297691A
Cited
US2843499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |