Patent US5297871A successfully refreshed from Google Patents.
Patent US2599542A successfully refreshed from Google Patents.
US2599542A
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Electrophotographic plate
Assignee: Individual
•
Filing: 1948-03-23
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Granted: 1952-06-10
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Expires: 1968-03-23
Abstract
No abstract record available.
Inventors
- 👤 Chester F Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:25
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G15/00; G03G15/04; G03G15/04027; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
AN ELECTROPHOTOGRAPHIC PLATE COMPRISING A CONDUCTIVE BACKING PLATE HAVING A SURFACE CHARACTERIZED BY A PATTERN OF ALTERNATE PROJECTIONS AND DEPRESSIONS, SAID SURFACE HAVING BETWEEN 1.600 AND 160,000 DEPRESSIONS TO THE SQUARE INCH, AND A COATING OF PHOTOCONDUCTIVE INSULATING SMOOTH OUTER FACE AT A HEIGHT NOT EXCEEDING 5 MILS ABOVE SAID PROJECTIONS.
Claim 2
Dependent Claim
51 words
AN ELECTROPHOTOGRAPHIC PLATE COMPRISING A CONDUCTIVE BACKING PLATE HAVING A SURFACE CHARACTERIZED BY A PATTERN OF ALTERNATE PROJECTIONS AND DEPRESSIONS, SAID SURFACE HAVING BETWEEN 1.600 AND 160,000 DEPRESSIONS TO THE SQUARE INCH, AND A COATING OF PHOTOCONDUCTIVE INSULATING SMOOTH OUTER FACE AT A HEIGHT NOT EXCEEDING 5 MILS ABOVE SAID PROJECTIONS.
References Cited (Backward Citations)
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Cited
US2234997A
Cited
US2297691A
Cited
US2357809A
Cited
US2441609A
Cited
US2493241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |