Patent US2873671A successfully refreshed from Google Patents.
US2873671A
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Assignee: AB Dick Co
•
Filing: 1955-05-11
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Granted: 1959-02-17
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Expires: 1975-05-11
Abstract
No abstract record available.
Inventors
- 👤 Robert T Florence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:49
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
127 words
THE METHOD OF PRODUCING COPY BY SPIRIT DUPLICATION WITH A MASTER IMAGED WITH A MATERIAL CONTAINING A LARGE PROPORTION OF A COUPLER-STABILIZED DIAZO COMPLEX COMPOUND LACKING IN COLOR TRANSFER VALUE AND WHICH IS INCAPABLE OF COUPLING REACTION WITHOUT ADJUSTMENT OF PH, COMPRISING CONTACTING THE IMAGED SURFACE OF THE MASTER WITH COPY SHEETS WETTED WITH A FLUID CONTAINING A SOLVENT FOR THE COUPLER-STABLIZED DIAZO COMPLEX COMPOUND AND A COMPOUND FOR ADJUSTMENT OF THE PH TO A LEVEL WHERE REACTION CAN TAKE PLACE BETWEEN THE COUPLER AND DIAZO COMPONENTS OF THE COMPOUND TO FORM THE CORRESPONDING AZO DYESTUFF WHEREBY SOME OF THE COUPLERSTABILIZED DIAZO COMPLEX COMPOUND TRANSFERS FROM THE IMAGED AREAS OF THE MASTER TO THE COPY SHEET UPON CONTACT WHERE REACTION TAKES PLACE TO FORM THE AZO DYESTUFF.
Claim 2
Independent Claim
127 words
THE METHOD OF PRODUCING COPY BY SPIRIT DUPLICATION WITH A MASTER IMAGED WITH A MATERIAL CONTAINING A LARGE PROPORTION OF A COUPLER-STABILIZED DIAZO COMPLEX COMPOUND LACKING IN COLOR TRANSFER VALUE AND WHICH IS INCAPABLE OF COUPLING REACTION WITHOUT ADJUSTMENT OF PH, COMPRISING CONTACTING THE IMAGED SURFACE OF THE MASTER WITH COPY SHEETS WETTED WITH A FLUID CONTAINING A SOLVENT FOR THE COUPLER-STABLIZED DIAZO COMPLEX COMPOUND AND A COMPOUND FOR ADJUSTMENT OF THE PH TO A LEVEL WHERE REACTION CAN TAKE PLACE BETWEEN THE COUPLER AND DIAZO COMPONENTS OF THE COMPOUND TO FORM THE CORRESPONDING AZO DYESTUFF WHEREBY SOME OF THE COUPLERSTABILIZED DIAZO COMPLEX COMPOUND TRANSFERS FROM THE IMAGED AREAS OF THE MASTER TO THE COPY SHEET UPON CONTACT WHERE REACTION TAKES PLACE TO FORM THE AZO DYESTUFF.
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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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |