Patent US3139891A successfully refreshed from Google Patents.
Patent US2907657A successfully refreshed from Google Patents.
US2907657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making printing media with resist-type orthochromatic film material
Assignee: Publication Corp
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Filing: 1955-04-28
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Granted: 1959-10-06
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Expires: 1975-04-28
Abstract
No abstract record available.
Inventors
- 👤 Kott Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:41
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A METHOD OF PREPARING A RESIST FOR INTAGLIO TYPE PRINTING PLATES, CYLINDER AND THE LIKE, COMPRISING SUBJECTING A HIGH CONTRAST, SILVER CHLORO-BRIMIDE RESIST-FORMING EMULSION TO A DIRECT FLASH EXPOSURE WITH LIGHT HIGH IN ULTRAVIOLET RADIATION AND A FLASH EXPOSURE WITH YELLOW LIGHT THROUTH A HALF-TONE SCREEN, THEN EXPOSING SAID EMULSION TO LIGHT RAYS FROM A PREDOMINANTLY YELLOW LIGHT SOURCE THROUGH A BLACK AND WHITE CONTINUOUS TONE TRANSPARENCY OF A SUBJECT AND A HALF-TONE SCREEN HAVING OPAQUE AND TRANSPARENT AREAS FOR A TIME SUFFICIENT TO PRODUCE A SCREENED IMAGE IN SAID EMULSION WHCH, WHEN DEVEOLPED, HAS A HIGH CONTRAST, THE EXPOSURE BEING STOPPED JUST SHORT OF THE POINT WHERE THE HIGH-LIGHT OPENINGS CLOSE UP, EXPOSING THE EMULSION TO LIGHT RAYS FROM A LIGHT SOURCE HIGH IN ULTRA-VIOLET RADIATION THROUGH A CONTINUOUS TONE TRANSPARENCY OF SAID SUBJECT, WITHOUT SAID SCREEN, FOR A SUFFI-
Claim 2
Independent Claim
141 words
A METHOD OF PREPARING A RESIST FOR INTAGLIO TYPE PRINTING PLATES, CYLINDER AND THE LIKE, COMPRISING SUBJECTING A HIGH CONTRAST, SILVER CHLORO-BRIMIDE RESIST-FORMING EMULSION TO A DIRECT FLASH EXPOSURE WITH LIGHT HIGH IN ULTRAVIOLET RADIATION AND A FLASH EXPOSURE WITH YELLOW LIGHT THROUTH A HALF-TONE SCREEN, THEN EXPOSING SAID EMULSION TO LIGHT RAYS FROM A PREDOMINANTLY YELLOW LIGHT SOURCE THROUGH A BLACK AND WHITE CONTINUOUS TONE TRANSPARENCY OF A SUBJECT AND A HALF-TONE SCREEN HAVING OPAQUE AND TRANSPARENT AREAS FOR A TIME SUFFICIENT TO PRODUCE A SCREENED IMAGE IN SAID EMULSION WHCH, WHEN DEVEOLPED, HAS A HIGH CONTRAST, THE EXPOSURE BEING STOPPED JUST SHORT OF THE POINT WHERE THE HIGH-LIGHT OPENINGS CLOSE UP, EXPOSING THE EMULSION TO LIGHT RAYS FROM A LIGHT SOURCE HIGH IN ULTRA-VIOLET RADIATION THROUGH A CONTINUOUS TONE TRANSPARENCY OF SAID SUBJECT, WITHOUT SAID SCREEN, FOR A SUFFI-
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) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |