Patent US3012886A successfully refreshed from Google Patents.
US3012886A
Expired / Lapsed
US
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Emulsion coating and method of preparation
Assignee: Individual
•
Filing: 1958-12-29
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Granted: 1961-12-12
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Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Harry H Lerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:39
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/04; G03F7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A PROCESS FOR PRODUCING A PRINTING PLATE FOR USE IN A COLLOTYPE PROCESS, THE STEPS OF COATING A PLATE WITH A LAYER OF A BICHROMATED LIGHT-SENSITIVE GELATIN EMULSION, SAID EMULSION HAVING A PH BETWEEN ABOUT 3 TO 6 AND CONTAINING EVENLY DISTRIBUTED THEREIN A WATER SOLUBLE ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF DIALDEHYDES AND KETOALDEHYDES IN AN AMOUNT OF ABOUT 0.045 TO 0.15 MILLIMOLE PER GRAM OF GELATIN, THEN EXPOSING SAID EMULSION TO THE ACTION OF LIGHT PASSING THROUGH A NEGATIVE, WASHING THE PLATE TO REMOVE SUBSTANTIALLY THE BICHROMATE, AND TREATING THE SURFACE OF THE EXPOSED EMULSION WITH FORMALDEHYDE IN AN AMOUNT AND FOR A TIME JUST SUFFICIENT TO REMOVE THE TACKINESS OF SAID SURFACE.
Claim 2
Dependent Claim
117 words
IN A PROCESS FOR PRODUCING A PRINTING PLATE FOR USE IN A COLLOTYPE PROCESS, THE STEPS OF COATING A PLATE WITH A LAYER OF A BICHROMATED LIGHT-SENSITIVE GELATIN EMULSION, SAID EMULSION HAVING A PH BETWEEN ABOUT 3 TO 6 AND CONTAINING EVENLY DISTRIBUTED THEREIN A WATER SOLUBLE ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF DIALDEHYDES AND KETOALDEHYDES IN AN AMOUNT OF ABOUT 0.045 TO 0.15 MILLIMOLE PER GRAM OF GELATIN, THEN EXPOSING SAID EMULSION TO THE ACTION OF LIGHT PASSING THROUGH A NEGATIVE, WASHING THE PLATE TO REMOVE SUBSTANTIALLY THE BICHROMATE, AND TREATING THE SURFACE OF THE EXPOSED EMULSION WITH FORMALDEHYDE IN AN AMOUNT AND FOR A TIME JUST SUFFICIENT TO REMOVE THE TACKINESS OF SAID SURFACE.
References Cited (Backward Citations)
GB190804361A
Cited
US1453259A
Cited
US1634658A
Cited
US1634659A
Cited
US2180335A
Cited
GB504378A
Cited
US2154895A
Cited
US2414858A
Cited
US2493838A
Cited
US2494055A
Cited
US2593912A
Cited
US2642362A
Cited
US2663639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |