US3096711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing copy
Assignee: Individual
•
Filing: 1959-04-14
•
Granted: 1963-07-09
•
Expires: 1979-04-14
Abstract
No abstract record available.
Inventors
- 👤 Ritzerfeld Wilhelm
- 👤 Ritzerfeld Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:03
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; B; B41; B41M; B41M5/00; B41M5/025; B41M5/0253; Y; Y10; Y10S; Y10S101/00; Y10S101/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
A METHOD OF PRODUCING COPY, COMPRISING, IN THE INDICATED SEQUENCE, THE STEPS OF FORMING ON A TRANSFER SHEET AN IMAGE CONSISTING ESSENTIALLY OF THE LEUCO COMPOUND OF A DYE; OXIDIZING SUBSTANTIALLY ALL OF SAID LEUCO COMPOUND; REACTING SAID OXIDIZED LEUCO COMPOUND ON SAID TRANSFER SHEET WITH AN ACIDIC SOLUTION SO AS TO SUBSTANTIALLY COMPLETELY TRANSFORM SAID OXIDIZED LEUCO COMPOUND INTO A DYE SOLUBLE IN WATER AND ALCOHOLIC SOLVENTS, SAID SOLUTION CONTAINING A SUBSTITUTED PHENOL WHICH RENDERS SAID DYE INSOLUBLE IN WATER WITHOUT IMPAIRING THE SOLUBILITY OF SAID DYE IN ALCOHOLIC SOLVENTS, AND TRANSFERRING THE IMAGE FORMED BY SAID DYE IN THE PRESENCE OF AN ALCOHOLIC SOLVENT THEREFOR FROM SAID TRANSFER SHEET ONTO A COPY SHEET.
References Cited (Backward Citations)
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Cited
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Cited
US2040075A
Cited
US2146976A
Cited
US2555603A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-08 | 1967-01-07 | 1967-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-08 | 1971-01-07 | 1971-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-08 | 1975-01-07 | 1975-07-09 | $7700.00 | Window Closed / Lapsed |