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US3872046A
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Sulfonated phenol (sulfo) phthalein
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1972-03-03
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Granted: 1975-03-18
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Expires: 1992-03-03
Abstract
Abstract Phenol (sulfo)phthalein derivatives sulfonated at the 5- and/or 5''-position, methods of preparation thereof, and the use of the derivatives as a sensitizing agent for photoconductive materials in the art of electrophotography.
Inventors
- 👤 Saburo Torii
- 👤 Takaaki Miyazaki
- 👤 Tatsuo Aizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:36
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/06; C09B11/08; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0629; G03G5/0631
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
26 words
The compound of claim 1, wherein X1 and X2 are bromine atoms, X3, X4, X5 and X6 are hydrogen atoms, and Z is a bromine atom.
Claim 4
Dependent Claim
22 words
The compound of claim 1, wherein X1, X2, X3, X4, X5 and X6 are bromine atoms, and Z is a bromine atom.
Claim 5
Dependent Claim
27 words
The compound of claim 1, wherein X1 and X2 are methyl groups, X3, X4, X5 and X6 are hydrogen atoms, and Z is a sulfonic acid group.
Claim 6
Dependent Claim
27 words
The compound of claim 1, wherein X1 and X2 are chlorine atoms, X3, X4, X5 and X6 are hydrogen atoms, and Z is a sulfonic acid group.
Claim 7
Dependent Claim
5 words
A compound of the formula
Claim 8
Dependent Claim
5 words
A compound of the formula
Claim 9
Dependent Claim
5 words
A compound of the formula
Claim 10
Dependent Claim
5 words
A compound of the formula
Claim 11
Dependent Claim
26 words
The compound of claim 1, wherein X1 and X2 are chlorine atoms, X3, X4, X5 and X6 are hydrogen atoms, and Z is a hydrogen atom.
References Cited (Backward Citations)
US3010964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |