Patent US3213003A successfully refreshed from Google Patents.
US3213003A
Expired / Lapsed
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Electrophotosensitive copy sheet and method of use thereof
Assignee: 3M Co
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Filing: 1961-08-01
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Granted: 1965-10-19
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Expires: 1981-08-01
Abstract
No abstract record available.
Inventors
- 👤 Edgar G Johnson
- 👤 Byron W Neher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:50
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A LIGHT-SENSITIVE SHEET CAPABLE OF MAKING A REPRODUCTION OF A LIGHT-IMAGE THEREON WICH COMPRISES AN ELECTRICALLY CONDUCTIVE CARRIER AND A PHOTOCONDUCTIVE MATERIAL HAVING A CONDUCTIVITY OF AT LEAST 10**-7 MHO PER CM. ON EXPOSURE TO LIGHT BONDED TO SAID CONDUCTIVE CARRIER AND TO AN OVERLYING NORMALLY SOLID, WATER-SOLUBLE TOP LAYER CONTAINING A DEVELOPER MATERIAL DIFFERENT FROM SAID PHOTOCONDUCTIVE MATERIAL WHICH IS CAPABLE OF EFFECTING A VISIBLE COLOR CHANGE ON SAID PHOTOCONDUCTIVE MATERIAL WHEN SUBJECTED TO ELECTROLYSIS.
Claim 2
Dependent Claim
76 words
A LIGHT-SENSITIVE SHEET CAPABLE OF MAKING A REPRODUCTION OF A LIGHT-IMAGE THEREON WICH COMPRISES AN ELECTRICALLY CONDUCTIVE CARRIER AND A PHOTOCONDUCTIVE MATERIAL HAVING A CONDUCTIVITY OF AT LEAST 10**-7 MHO PER CM. ON EXPOSURE TO LIGHT BONDED TO SAID CONDUCTIVE CARRIER AND TO AN OVERLYING NORMALLY SOLID, WATER-SOLUBLE TOP LAYER CONTAINING A DEVELOPER MATERIAL DIFFERENT FROM SAID PHOTOCONDUCTIVE MATERIAL WHICH IS CAPABLE OF EFFECTING A VISIBLE COLOR CHANGE ON SAID PHOTOCONDUCTIVE MATERIAL WHEN SUBJECTED TO ELECTROLYSIS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |