US4565761A
Expired / Lapsed
US
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Electrophotographic process utilizing an azulenium salt-containing photosensitive member
Assignee: Canon Inc
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Filing: 1984-06-15
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Granted: 1986-01-21
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Expires: 2004-06-15
Abstract
Abstract An electrophotographic process involving charging and exposing to light a radiation sensitive organic thin film comprising a compound which has at least one nucleus of an azulenium salt.
Inventors
- 👤 Kazuharu Katagiri
- 👤 Yoshihiro Oguchi
- 👤 Yoshio Takasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; C; C07; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/47; C07C13/52; C07C43/00; C07C43/02; C07C43/20; C07C43/215; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07C49/00; C07C49/587; C07C49/703; C07C49/743; C07C49/747; C07C49/753; C07C49/76; C07C49/82; C07C49/835; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/86; C07D309/00; C07D309/34; C07D335/00; C07D335/02; G03G5/0601; G03G5/0605; G03G5/0607; G03G5/0609; G03G5/0611; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/26; C07C2602/30; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
70 words
An electrophotographic process comprising the steps of: (a) charging an electrophotographic photosensitive member having a conductive substrate and a photosensitive layer containing a compound having at least one nucleus of an azulenium salt with charges of a positive or negative polarity, (b) imagewise exposing the charged photosensitive member to a pattern of light sufficient to produce an electrostatic latent image, and (c) developing the resulting latent image with a developer.
Claim 2
Dependent Claim
70 words
An electrophotographic process comprising the steps of: (a) charging an electrophotographic photosensitive member having a conductive substrate and a photosensitive layer containing a compound having at least one nucleus of an azulenium salt with charges of a positive or negative polarity, (b) imagewise exposing the charged photosensitive member to a pattern of light sufficient to produce an electrostatic latent image, and (c) developing the resulting latent image with a developer.
Claim 3
Dependent Claim
68 words
An electrophotographic process comprising the steps of: (a) charging an electrophotographic photosensitive member having a conductive substrate and a photosensitive layer containing a compound having at least one nucleus of an azulenium salt with charges of a positive or negative polarity, (b) exposing the charged photosensitive member by scanning with a laser beam emitted from a laser source, and (c) developing the resulting latent image with a developer.
Claim 4
Dependent Claim
68 words
An electrophotographic process comprising the steps of: (a) charging an electrophotographic photosensitive member having a conductive substrate and a photosensitive layer containing a compound having at least one nucleus of an azulenium salt with charges of a positive or negative polarity, (b) exposing the charged photosensitive member by scanning with a laser beam emitted from a laser source, and (c) developing the resulting latent image with a developer.
Claim 5
Dependent Claim
83 words
An electrophotographic process of repeating at least twice the steps comprising: (a) charging an electrophotographic photosensitive member having a conductive substrate and a photosensitive layer containing a compound having at least one nucleus of an azulenium salt with charges of a positive or negative polarity, (b) exposing the charged photosensitive member to a pattern of light sufficient to produce an electrostatic latent image, (c) developing the resulting latent image with a developer, and (d) transferring the developed image onto a transfer copying medium.
Claim 6
Dependent Claim
83 words
An electrophotographic process of repeating at least twice the steps comprising: (a) charging an electrophotographic photosensitive member having a conductive substrate and a photosensitive layer containing a compound having at least one nucleus of an azulenium salt with charges of a positive or negative polarity, (b) exposing the charged photosensitive member to a pattern of light sufficient to produce an electrostatic latent image, (c) developing the resulting latent image with a developer, and (d) transferring the developed image onto a transfer copying medium.
Claim 7
Dependent Claim
82 words
An electrophotographic process of repeating at least twice the steps comprising: (a) charging an electrophotographic photosensitive member having a conductive substrate and a photosensitive layer containing a compound having at least one nucleus of an azulenium salt with charges of a positive or negative polarity, (b) exposing the charged photosensitive member by scanning with a laser beam emitted from a laser source, (c) developing the resulting latent image with a developer, and (d) transferring the developed image onto a transfer copying medium.
Claim 8
Dependent Claim
82 words
An electrophotographic process of repeating at least twice the steps comprising: (a) charging an electrophotographic photosensitive member having a conductive substrate and a photosensitive layer containing a compound having at least one nucleus of an azulenium salt with charges of a positive or negative polarity, (b) exposing the charged photosensitive member by scanning with a laser beam emitted from a laser source, (c) developing the resulting latent image with a developer, and (d) transferring the developed image onto a transfer copying medium.
Claim 9
Dependent Claim
84 words
An electrophotographic process comprising the steps of: (a) charging an electrophotographic photosensitive member having a conductive substrate and two photosensitive layers of laminate structure comprising (1) a charge generation layer containing a compound having at least one nucleus of an azulenium salt and (2) a charge transport layer with charges of a positive or negative polarity, (b) exposing the charge photosensitive member to a pattern of light sufficient to produce an electrostatic latent image, and (c) developing the resulting latent image with a developer.
Claim 10
Dependent Claim
84 words
An electrophotographic process comprising the steps of: (a) charging an electrophotographic photosensitive member having a conductive substrate and two photosensitive layers of laminate structure comprising (1) a charge generation layer containing a compound having at least one nucleus of an azulenium salt and (2) a charge transport layer with charges of a positive or negative polarity, (b) exposing the charge photosensitive member to a pattern of light sufficient to produce an electrostatic latent image, and (c) developing the resulting latent image with a developer.
Claim 11
Dependent Claim
18 words
The electrophotographic process of claim 5, wherein said charge transport layer comprises a hole-transporting material and a binder.
Claim 12
Dependent Claim
15 words
The electrophotographic process of claim 6, wherein the charging is with charges of negative polarity.
Claim 13
Dependent Claim
18 words
The electrophotographic process of claim 5, wherein said charge transport layer comprises an electron-transporting material and a binder.
Claim 14
Dependent Claim
15 words
The electrophotographic process of claim 8, wherein the charging is with charges of positive polarity.
Claim 15
Dependent Claim
83 words
An electrophotographic process comprising the steps of: (a) charging an electrophotographic photosensitive member having a conductive substrate and two photosensitive layers of laminate structure comprising (1) a charge generation layer containing a compound having at least one nucleus of an azulenium salt and (2) a charge transport layer with charges of a positive or negative polarity, (b) exposing the charged photosensitive member by scanning with a laser beam emitted from a laser source, and (c) developing the resulting latent image with a developer.
Claim 16
Dependent Claim
83 words
An electrophotographic process comprising the steps of: (a) charging an electrophotographic photosensitive member having a conductive substrate and two photosensitive layers of laminate structure comprising (1) a charge generation layer containing a compound having at least one nucleus of an azulenium salt and (2) a charge transport layer with charges of a positive or negative polarity, (b) exposing the charged photosensitive member by scanning with a laser beam emitted from a laser source, and (c) developing the resulting latent image with a developer.
Claim 17
Dependent Claim
15 words
The electrophotographic process of claim 10, wherein said laser source is a semiconductor laser device.
Claim 18
Dependent Claim
15 words
The electrophotographic process of claim 10, wherein said laser source is a gas laser device.
Claim 19
Dependent Claim
16 words
The electrophotographic process of a claim 10, wherein the charging is with charges of negative polarity.
Claim 20
Dependent Claim
16 words
The electrophotographic process of claim 13, wherein the charging step is carried out by negative polarity.
Claim 21
Dependent Claim
18 words
The electrophotographic process of claim 10, wherein said charge transport layer comprises an electron-transporting material and a binder.
Claim 22
Dependent Claim
15 words
The electrophotographic process of claim 15, wherein the charging is with charges of positive polarity.
Claim 23
Dependent Claim
98 words
An electrophotographic process of repeating at least twice the steps comprising: (a) charging an electrophotographic photosensitive member having a conductive substrate and two photosensitive layers of laminate structure comprising (1) a charge generation layer containing a compound having at least one nucleus of an azulenium salt and (2) a charge transport layer with charges of a positive or negative polarity, (b) exposing the charged photosensitive member to a pattern of light sufficient to produce an electrostatic latent image, (c) developing the resulting latent image with a developer, and (d) transferring the developed image onto a transfer copying medium.
Claim 24
Dependent Claim
98 words
An electrophotographic process of repeating at least twice the steps comprising: (a) charging an electrophotographic photosensitive member having a conductive substrate and two photosensitive layers of laminate structure comprising (1) a charge generation layer containing a compound having at least one nucleus of an azulenium salt and (2) a charge transport layer with charges of a positive or negative polarity, (b) exposing the charged photosensitive member to a pattern of light sufficient to produce an electrostatic latent image, (c) developing the resulting latent image with a developer, and (d) transferring the developed image onto a transfer copying medium.
Claim 25
Dependent Claim
97 words
An electrophotographic process of repeating at least twice the steps comprising: (a) charging an electrophotographic photosensitive member having a conductive substrate and two photosensitive layer of laminate structure comprising (1) a charge generation layer containing a compound having at least one nucleus of an azulenium salt and (2) a charge transport layer with charges of a positive or negative polarity, (b) exposing the charged photosensitive member by scanning with a laser beam emitted from a laser source, (c) developing the resulting latent image with a developer, and (d) transferring the developed image onto a transfer copying medium.
Claim 26
Dependent Claim
97 words
An electrophotographic process of repeating at least twice the steps comprising: (a) charging an electrophotographic photosensitive member having a conductive substrate and two photosensitive layer of laminate structure comprising (1) a charge generation layer containing a compound having at least one nucleus of an azulenium salt and (2) a charge transport layer with charges of a positive or negative polarity, (b) exposing the charged photosensitive member by scanning with a laser beam emitted from a laser source, (c) developing the resulting latent image with a developer, and (d) transferring the developed image onto a transfer copying medium.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |