US3072541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer
Assignee: 3M Co
•
Filing: 1958-10-17
•
Granted: 1963-01-08
•
Expires: 1978-10-17
Abstract
No abstract record available.
Inventors
- 👤 Benjamin L Shely
- 👤 Bryce L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:29
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/06; G03G17/00; G03G17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE PROCESS FOR PRODUCING PERMANENT, DENSE IMAGEFORMING DEPOSITS ON LIGHT-EXPOSED AREAS OF STRONGLY PHOTOCONDUCTIVE PHOTOSENSITIVE COPY-PAPER HAVING A PHA PHOTOCONDUCTIVE COATING ON AN ELECTRICALLY CONDUCTIVE BACKING, SAID COPY-PAPER BEING CAPABLE OF ELECTROLYTIC IMAGE REPRODUCTION THEREON, WHICH COMPRISES ELECTROLYZING AT THE CONDUCTIVE LIGHT EXPOSED AREAS OF SAID PHOTOCONDUCTIVE COATING A STABLE LIQUID ELECTROLYTIC DEVELOPER SOLUTION CONSISTING ESSENTIALLY OF A STABLE SOLUTION IN AN IONIZING SOLVENT OF A SOLUBLE ELECTROLYZABLE COMPLEX OF A SILVER SALT AND A THIOUREA IN A 1:3 MOLAR RATIO, SAID ELECTRICALLY CONDUCTIVE BACKING BEING CONNECTED AS CATHODE.
Claim 2
Dependent Claim
89 words
THE PROCESS FOR PRODUCING PERMANENT, DENSE IMAGEFORMING DEPOSITS ON LIGHT-EXPOSED AREAS OF STRONGLY PHOTOCONDUCTIVE PHOTOSENSITIVE COPY-PAPER HAVING A PHA PHOTOCONDUCTIVE COATING ON AN ELECTRICALLY CONDUCTIVE BACKING, SAID COPY-PAPER BEING CAPABLE OF ELECTROLYTIC IMAGE REPRODUCTION THEREON, WHICH COMPRISES ELECTROLYZING AT THE CONDUCTIVE LIGHT EXPOSED AREAS OF SAID PHOTOCONDUCTIVE COATING A STABLE LIQUID ELECTROLYTIC DEVELOPER SOLUTION CONSISTING ESSENTIALLY OF A STABLE SOLUTION IN AN IONIZING SOLVENT OF A SOLUBLE ELECTROLYZABLE COMPLEX OF A SILVER SALT AND A THIOUREA IN A 1:3 MOLAR RATIO, SAID ELECTRICALLY CONDUCTIVE BACKING BEING CONNECTED AS CATHODE.
References Cited (Backward Citations)
DE151971C
Cited
US1902213A
Cited
US1857507A
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US1903860A
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US2083249A
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US2186859A
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US2443119A
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US2692190A
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US2854386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |