Patent US3314788A successfully refreshed from Google Patents.
US3314788A
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Electrophotographic process and element comprising n, n, n,' n', tetrasubstituted-p-phenylenediamines
Assignee: Warren SD Co
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Filing: 1966-04-14
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Granted: 1967-04-18
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Expires: 1986-04-14
Abstract
No abstract record available.
Inventors
- 👤 Mattor John Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN ELECTROPHOTOGRAPHIC PLATE COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER ON A RELATIVELY MORE CONDUCTIVE SUPPORT, THE PHOTOCONDUCTIVE LAYER CONTAINING A N,N,N''N'' TETRA-SUBSTITUTED-P-PHENYLENEDIAMINE CONTAINING AT LEAST ONE BENZYL GROUP EACH IN THE N, AND N'' POSITION WITH THE REMAINING TWO SUBSTITUENT GROUPS BEING SELECTED FROM THE GROUP CONSISTING OF BENZYL RADICALS AND ALKYL RADICALS.
Claim 2
Dependent Claim
52 words
AN ELECTROPHOTOGRAPHIC PLATE COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER ON A RELATIVELY MORE CONDUCTIVE SUPPORT, THE PHOTOCONDUCTIVE LAYER CONTAINING A N,N,N''N'' TETRA-SUBSTITUTED-P-PHENYLENEDIAMINE CONTAINING AT LEAST ONE BENZYL GROUP EACH IN THE N, AND N'' POSITION WITH THE REMAINING TWO SUBSTITUENT GROUPS BEING SELECTED FROM THE GROUP CONSISTING OF BENZYL RADICALS AND ALKYL RADICALS.
References Cited (Backward Citations)
US2938922A
Cited
US3265496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |