US3305459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic electrocopying method and apparatus
Assignee: 3M Co
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Filing: 1963-08-27
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Granted: 1967-02-21
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Expires: 1983-08-27
Abstract
No abstract record available.
Inventors
- 👤 Alan J Smith
- 👤 Jack K Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/02; G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101; G03G17/00; G03G17/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
THE METHOD OF DEVELOPING ELECTROLYTICALLY AN IMAGE PATTERN FORMED ON A PHOTOCONDUCTIVE COPY PAPER AFTER EXPOSURE THEREOF TO A LIGHT-IMAGE A PHOTOCONDUCTIVE COPY PAPER, COMPRISING THE STEPS OF FEEDING THE EXPOSED SHEET OF PHOTOCONDUCTIVE COPY PAPER ACROSS AND IN VERTICAL SPACED RELATION TO A RESERVOIR CONTAINING A SUPPLY OF ELECTROLYTIC SOLUTION, ROTATING A PAIR OF PARALLEL SPACED ROLLERS PARTIALLY IMMERSED IN SAID SOLUTION TO PUMP THE SAME UPWARDLY IN A TURBULENT STREAM HAVING A CONTRACTING RELATIONSHIP WITH A LARGE EXPOSED SURFACE AREA OF THE COPY PAPER WHILE IMPRESSING AN ELECTRIC POTENTIAL BETWEEN SAID PAPER AND SAID SOLUTION FOR ELECTROLYTIC DEPOSITION FROM THE ELECTROLYTIC SOLUTION ON SAID COPY PAPER TO AFFORD DEVELOPMENT OF A VISIBLE IMAGE PATTERN ON SAID COPY PAPER WHICH IS FREE FROM STREAKS.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |