US2873668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dye duplicating process
Assignee: AB Dick Co
•
Filing: 1953-04-13
•
Granted: 1959-02-17
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Robert J Klimkowski
- 👤 Robert T Florence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:12
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
96 words
THE METHOD OF PRODUCING COPY WITH A MASTER IMAGED WITH A COMPOSITION CONTAINING AN ACIDIC MEDIUM AND AN AMINE COMPOUND CAPABLE OF DIAZOTIZATION, COMPRISING THE STEPS OF WETTING THE SURFACE OF AN IMPRESSION PAPER WITH A FLUID CONTAINING A SOLVENT FOR THE DIAZITIZABLE AMINE AND ACID AND ALSO CONTAINING A NITRITE AND A COUPLER, AND CONTRACTING THE IMAGE SURFACE OF THE MASTER WITH THE WETTED SURFACE OF THE IMPRESSION PAPER, WHEREBY SOME OF THE DIAZOTIZABLE AMINE COMPOUND TRANSFERS FROM THE IMAGED PORTION OF THE MASTER TO THE IMPRESSION PAPER FOR REACTION TO FORM THE AZO DYESTUFF.
Claim 2
Independent Claim
96 words
THE METHOD OF PRODUCING COPY WITH A MASTER IMAGED WITH A COMPOSITION CONTAINING AN ACIDIC MEDIUM AND AN AMINE COMPOUND CAPABLE OF DIAZOTIZATION, COMPRISING THE STEPS OF WETTING THE SURFACE OF AN IMPRESSION PAPER WITH A FLUID CONTAINING A SOLVENT FOR THE DIAZITIZABLE AMINE AND ACID AND ALSO CONTAINING A NITRITE AND A COUPLER, AND CONTRACTING THE IMAGE SURFACE OF THE MASTER WITH THE WETTED SURFACE OF THE IMPRESSION PAPER, WHEREBY SOME OF THE DIAZOTIZABLE AMINE COMPOUND TRANSFERS FROM THE IMAGED PORTION OF THE MASTER TO THE IMPRESSION PAPER FOR REACTION 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 |