US2634677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dye duplicating process
Assignee: AB Dick Co
•
Filing: 1952-07-07
•
Granted: 1953-04-14
•
Expires: 1972-07-07
Abstract
No abstract record available.
Inventors
- 👤 Robert J Klimkowski
- 👤 Robert T Florence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:58
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/025; B41M5/0253; Y; Y10; Y10S; Y10S101/00; Y10S101/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
THE METHOD OF PRODUCING COPY COMPRISING THE STEPS OF IMAGING A MASTER WITH A COMPRISING TION SUBSTANTIALLY FREE OF ANY DYE COLOR AND CONTAINING A HIGH PROPORTION OF A STABILIZED DIAZO DYE INTERMEDIATE AND A COUPLER BOTH OF WHICH ARE SOLUBLE IN A MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER, ALCOHOL AND MIXTURES THEREOF CAPABLE OF REACTION WITH THE DIAZO DYE INTERMEDIATE TO FORM A SUBSTANTIALLY WATER INSOLUBLE AZO DYESTUFF, THE IMAGING COMPOSITION BEING MAINTAINED AT A PH BELOW THAT AT WHICH COUPLING TAKES PLACE TO PREVENT REACTION BETWEEN THE INTERMEDIATE AND THE COUPLER, WETTING THE SURFACE OF A COPY SHEET WITH A FLUID CONTAINING A SOLVENT FOR THE DIAZO DYE INTERMEDIATE AND COUPLER AND CONTAINING A BASE FOR ADJUSTING THE PH TO PERMIT REACTION BETWEEN THE DIAZO DYE INTERMEDIATE AND COUPLER TO FORM THE AZO DYESTUFF, CONTACTING THE WETTED COPY SHEET WITH THE IMAGED SURFACE OF THE MASTER TO EFFECT TRANSFER OF SOME OF THE IMAGING MATERIAL TO THE COPY SHEET WHEREBY REACTION TAKES PLACE TO FORM THE AZO DYESTUFF THEREIN.
Claim 2
Independent Claim
173 words
THE METHOD OF PRODUCING COPY COMPRISING THE STEPS OF IMAGING A MASTER WITH A COMPRISING TION SUBSTANTIALLY FREE OF ANY DYE COLOR AND CONTAINING A HIGH PROPORTION OF A STABILIZED DIAZO DYE INTERMEDIATE AND A COUPLER BOTH OF WHICH ARE SOLUBLE IN A MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER, ALCOHOL AND MIXTURES THEREOF CAPABLE OF REACTION WITH THE DIAZO DYE INTERMEDIATE TO FORM A SUBSTANTIALLY WATER INSOLUBLE AZO DYESTUFF, THE IMAGING COMPOSITION BEING MAINTAINED AT A PH BELOW THAT AT WHICH COUPLING TAKES PLACE TO PREVENT REACTION BETWEEN THE INTERMEDIATE AND THE COUPLER, WETTING THE SURFACE OF A COPY SHEET WITH A FLUID CONTAINING A SOLVENT FOR THE DIAZO DYE INTERMEDIATE AND COUPLER AND CONTAINING A BASE FOR ADJUSTING THE PH TO PERMIT REACTION BETWEEN THE DIAZO DYE INTERMEDIATE AND COUPLER TO FORM THE AZO DYESTUFF, CONTACTING THE WETTED COPY SHEET WITH THE IMAGED SURFACE OF THE MASTER TO EFFECT TRANSFER OF SOME OF THE IMAGING MATERIAL TO THE COPY SHEET WHEREBY REACTION TAKES PLACE TO FORM THE AZO DYESTUFF THEREIN.
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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) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |