Patent US3372639A successfully refreshed from Google Patents.
US3372639A
Expired / Lapsed
US
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Method of making curved electrostatic printing screens
Assignee: Monsanto Co
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Filing: 1965-06-11
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Granted: 1968-03-12
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Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 James W Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:11
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/12; G03G; G03G15/00; G03G15/22; G03G15/26; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF MAKING ELECTROSTATIC PRINTING SCREENS SAID METHOD COMPRISING APPLYING A PHOTOSENSITIVE EMULSION TO THE SURFACE OF AN ELECTRICALLY NON-CONDUCTIVE FABRIC, APPLYING A MASK OF A DESIRED PRINT IMAGE TO THE SURFACE HAVING THE PHOTOSENSITIVE EMULSION, EXPOSING THE EMULSION TO A SOURCE OF LIGHT SO THAT THE PORTION NOT COVERED BY MASKED AREAS RECEIVES LIGHT REMOVING THE MASK, REMOVING THE UNEXPOSED EMULSION, METALIZING THE OPEN AREAS OF THE FABRIC TO RENDER THE FABRIC ELECTRICALLY CONDUCTIVE, METALIZING THE FABRIC IN A SECOND METALIZING OPERATION SO THAT THE METAL IS FILLED IN THE INTERSTICES OF THE OPEN MESH PORTIONS OF THE FABRIC TO PROVIDE A FAIRLY RIGID SCREEN MEMBER TREATING THE SCREEN MEMBER WITH AN EMULSION REMOVER TO CONVERT THE POSITIVE IMAGE TO A NEGATIVE IMAGE, AND FORMING THE SCREEN MEMBER TO A DESIRED SHAPE.
Claim 2
Independent Claim
134 words
THE METHOD OF MAKING ELECTROSTATIC PRINTING SCREENS SAID METHOD COMPRISING APPLYING A PHOTOSENSITIVE EMULSION TO THE SURFACE OF AN ELECTRICALLY NON-CONDUCTIVE FABRIC, APPLYING A MASK OF A DESIRED PRINT IMAGE TO THE SURFACE HAVING THE PHOTOSENSITIVE EMULSION, EXPOSING THE EMULSION TO A SOURCE OF LIGHT SO THAT THE PORTION NOT COVERED BY MASKED AREAS RECEIVES LIGHT REMOVING THE MASK, REMOVING THE UNEXPOSED EMULSION, METALIZING THE OPEN AREAS OF THE FABRIC TO RENDER THE FABRIC ELECTRICALLY CONDUCTIVE, METALIZING THE FABRIC IN A SECOND METALIZING OPERATION SO THAT THE METAL IS FILLED IN THE INTERSTICES OF THE OPEN MESH PORTIONS OF THE FABRIC TO PROVIDE A FAIRLY RIGID SCREEN MEMBER TREATING THE SCREEN MEMBER WITH AN EMULSION REMOVER TO CONVERT THE POSITIVE IMAGE TO A NEGATIVE IMAGE, AND FORMING THE SCREEN MEMBER TO A DESIRED SHAPE.
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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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |