Patent US3140175A successfully refreshed from Google Patents.
US3140175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color electrophotography
Assignee: Individual
•
Filing: 1960-03-14
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Granted: 1964-07-07
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Expires: 1980-03-14
Abstract
No abstract record available.
Inventors
- 👤 Edward K Kaprelian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:59
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A METHOD OF COLOR ELECTROPHOTOGRAPHY COMPRISING THE STEPS OF PROVIDING A UNIFORM SUBSTANTIALLY CONTINUOUS LAYER OF TRANSPARENT IMAGE FORMING PARTICLES OF AT LEAST TWO COLORS ON A PHOTOCONDUCTIVE INSULATING SURFACE, PROJECTING AN IMAGE CONTAINING AT LEAST SAID TWO COLORS THROUGH SAID LAYER OF PARTICLES AND THEN ONTO SAID PHOTOCONDUCTIVE
Claim 2
Independent Claim
49 words
A METHOD OF COLOR ELECTROPHOTOGRAPHY COMPRISING THE STEPS OF PROVIDING A UNIFORM SUBSTANTIALLY CONTINUOUS LAYER OF TRANSPARENT IMAGE FORMING PARTICLES OF AT LEAST TWO COLORS ON A PHOTOCONDUCTIVE INSULATING SURFACE, PROJECTING AN IMAGE CONTAINING AT LEAST SAID TWO COLORS THROUGH SAID LAYER OF PARTICLES AND THEN ONTO SAID PHOTOCONDUCTIVE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |