PATENT CLAIM ANALYSIS

Application Number: 15879853
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["430", "075000"]

Abstract:
An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, a binder resin, and an additive. The additive contains a carboxylic acid anhydride. A reduction potential of the carboxylic acid anhydride is at least −1.40 V versus a reference electrode (Ag/Ag + ). The carboxylic acid anhydride is contained in an amount of at least 0.02 parts by mass and no greater than 10.00 parts by mass relative to 100 parts by mass of the binder resin.

Claim (Index 2):
The electrophotographic photosensitive member according to  claim 1 , wherein\n the carboxylic acid anhydride is represented by general formula (1), (2), (3), (4), or (5) shown below, where in general formula (1), R 1  and R 2  each represent an alkyl group optionally having at least one halogen atom and having a carbon number of at least 1 and no greater than 6, and R 1  and R 2  may be the same as or different from one another, and in general formulae (2), (3), (4), and (5), a ring Y 2 , a ring Y 3 , a ring Y 4A , a ring Y 4B , a ring Y 5A , and a ring Y 5B  each represent, independently of one another, a non-aromatic heterocycle having at least 5 and no greater than 7 ring members, the non-aromatic heterocycle being monocyclic, the non-aromatic heterocycle includes, as ring member atoms, two carbon atoms and one oxygen atom of fused carboxyl groups, the non-aromatic heterocycle may further include at least one hetero atom as a ring member atom other than the oxygen atom, the non-aromatic heterocycle represented by the ring Y 2  has at least one first substituent, the non-aromatic heterocycles represented by the ring Y 3 , the ring Y 4A , the ring Y 4B , the ring Y 5A , and the ring Y 5B  each optionally have, independently of one another, at least one second substituent, the first substituent and the second substituent are each, independently of one another, a halogen atom or an aryl group having a carbon number of at least 6 and no greater than 14, the ring Y 4A  and the ring Y 4B  may be the same as or different from one another, the ring Y 5A  and the ring Y 5B  may be the same as or different from one another, a ring Z 3 , a ring Z 4 , a ring Z 5A , and a ring Z 5B  are monocyclic or polycyclic, the ring Z 3  is fused with the ring Y 3 , the ring Z 4  is fused with the rings Y 4A  and Y 4B , the ring Z 5A  is fused with the ring Y 5A , and the ring Z 5B  is fused with the ring Y 5B , the ring Z 3 , the ring Z 4 , the ring Z 5A , and the ring Z 5B  are each at least one aromatic hydrocarbon ring having a carbon number of at least 6 and no greater than 14 or at least one aromatic heterocycle having a carbon number of at least 3 and no greater than 14, the ring Z 3 , the ring Z 4 , the ring Z 5A , and the ring Z 5B  each optionally have at least one fourth substituent, provided that the ring Z 3  has the fourth substituent when the ring Z 3  is the aromatic heterocycle, the fourth substituent represents an alkynyl group that has a carbon number of at least 2 and no greater than 4 and that optionally has an aryl group having a carbon number of at least 6 and no greater than 14, an alkyl group having a carbon number of at least 1 and no greater than 6, a carboxyl group, a halogen atom, or a nitro group, X represents a carbonyl group, a sulfonyl group, a single bond, a divalent group represented by chemical formula (5-1) shown below, an oxygen atom, or a methylene group optionally having at least one third substituent, and the third substituent represents an alkyl group optionally having at least one halogen atom and having a carbon number of at least 1 and no greater than 6.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 86.0
- Lexical Diversity: 1.9322
- Patent Class: 430.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15160601', '16092013', '15247373', '15077144', '16472178']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7894005192712055
- 35 USC 102 Novelty (BERT): 0.4891076608366974
- Combined Prediction Score: 0.7593712334277547
- Mean Citation Score: 235.462686
- Max Citation Score: 240.03873
- Similarity Product: 182.1561321121967

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test