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US5508395A
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Hydroxygallium phthalocyanine crystal, process for preparing same
Assignee: Fujifilm Business Innovation Corp
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Filing: 1994-03-25
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Granted: 1996-04-16
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Expires: 2014-03-25
Abstract
Abstract A hydroxygallium phthalocyanine crystal, having distinct diffraction peaks at Bragg angles (2θ+/-0.2°) of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° to CuKα characteristic X-ray-in X-ray diffraction spectrum; a process for preparing the hydroxygallium phthalocyanine crystal; and a electrophotographic photoreceptor comprising the hydroxygallium phthalocyanine crystal.
Inventors
- 👤 Katsumi Daimon
- 👤 Katsumi Nukada
- 👤 Yasuo Sakaguchi
- 👤 Ryosaku Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:42
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0025; C09B67/0026; C09B67/0001; C09B67/0017; C09B67/0019; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0696
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
27 words
A hydroxygallium phthalocyanine crystal, having distinct diffraction peaks at Bragg angles (2θ+/-0.2°) of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° to CuKα characteristic X-ray in X-ray diffraction spectrum.
Claim 2
Dependent Claim
27 words
A hydroxygallium phthalocyanine crystal, having distinct diffraction peaks at Bragg angles (2θ+/-0.2°) of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° to CuKα characteristic X-ray in X-ray diffraction spectrum.
Claim 3
Dependent Claim
71 words
A process for preparing a hydroxygallium phthalocyanine crystal having distinct diffraction peaks at Bragg angles (2θ+/-0.2°) of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° to CuKα characteristic X-ray in X-ray diffraction spectrum, said process comprising the steps of: adding a gallium phthalocyanine to a concentrated acid to make a solution or a slurry; and then bringing said solution or said slurry into contact with an alkaline aqueous solution containing an organic solvent.
Claim 4
Dependent Claim
71 words
A process for preparing a hydroxygallium phthalocyanine crystal having distinct diffraction peaks at Bragg angles (2θ+/-0.2°) of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° to CuKα characteristic X-ray in X-ray diffraction spectrum, said process comprising the steps of: adding a gallium phthalocyanine to a concentrated acid to make a solution or a slurry; and then bringing said solution or said slurry into contact with an alkaline aqueous solution containing an organic solvent.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 2, wherein said concentrated acid is sulfuric acid having a concentration of 70% by weight or more.
Claim 6
Dependent Claim
23 words
A process as claimed in claim 3, wherein said concentrated acid is sulfuric acid having a concentration of 90% by weight or more.
Claim 7
Dependent Claim
32 words
A process as claimed in claim 2, wherein an alkali material of said alkaline aqueous solution is ammonia, and said organic solvent is selected from the group consisting of acetone and, dichloromethane.
Claim 8
Dependent Claim
46 words
A process as claimed in claim 5, wherein the concentration of ammonia in said alkali aqueous solution is from 10 to 30% by weight, and the amount of said organic solvent is 1/10 to 10 times the amount of water contained in said alkaline aqueous solution.
Claim 9
Dependent Claim
29 words
A process as claimed in claim 2, wherein the amount of said alkaline aqueous solution is from 1 to 100 times the amount of said solution or said slurry.
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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) | 1999-04-16 | 1999-10-16 | 2000-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-16 | 2003-10-16 | 2004-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-16 | 2007-10-16 | 2008-04-16 | $7700.00 | Window Closed / Lapsed |