PATENT CLAIM ANALYSIS

Application Number: 16301210
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-06
Patent Classification: ["546", "047000"]

Abstract:
The present disclosure relates to Quinacridone pigment and a process of preparation thereof. The Quinacridone pigment of the present disclosure exhibit higher chemical resistance to solvents, higher stability and higher resistance to acid and alkali.

Claim (Index 2):
A process for preparing Quinacridone pigment comprising 2,9-bis(isopropyl)quinacridone of Formula (I) as claimed in  claim 1 ; said process comprising the following steps:\n i) condensing 4-isopropylaniline (II) and dimethyl succinylsuccinate (III) in at least one first fluid medium, in the presence of at least one mineral acid catalyst, at a pressure in the range of 0.5 kg/cm 2 , and at a temperature in the range of 65 to 90\u00b0 C. for a first predetermined time period to produce Dimethyl 2,5-bis(4-isopropylphenylamino)cyclohexa-1,4-diene-1,4-dicarboxylate (IV), heating said Dimethyl 2,5-bis(4-isopropylphenylamino)cyclohexa-1,4-diene-1,4-dicarboxylate (IV), at a temperature in the range of 108 to 115\u00b0 C., and at a pressure in the range of 1.0 to 4.0 kg/cm 2 , in the presence of resist salt, at least one alkali, and water to obtain alkali metal salt of 2,5-bis(4-isopropylphenylamino)benzene-1,4-dioic acid, which on acidifying provides crude 2,5-bis(4-isopropylphenylamino)benzene-1,4-dioic acid (V) and optionally, purifying said crude 2,5-bis(4-isopropylphenylamino)benzene-1,4-dioic acid (V) by washing with a second fluid medium to obtain 2,5-bis(4-isopropylphenylamino)benzene-1,4-dioic acid (V) ii) cyclizing said 2,5-bis(4-isopropylphenylamino)benzene-1,4-dioic acid (V) in the presence of predetermined amount of polyphosphoric acid at a temperature in the range of 90 to 150\u00b0 C., for a predetermined time period to obtain crude 2,9-bis(isopropyl)quinacridone (VI); and iii) washing said crude 2,9-bis(isopropyl)quinacridone (VI) with at least one third fluid medium, and drying to obtain 2,9-bis(isopropyl)quinacridone (I).

Metadata:
- Claim Count in Document: 39.0
- Percentile: 98.0
- Lexical Diversity: 1.58333
- Patent Class: 546.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10988250', '10500949', '10517412', '11488875', '10752617']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.751002105987896
- 35 USC 102 Novelty (BERT): 0.4906450988557678
- Combined Prediction Score: 0.7249664052746831
- Mean Citation Score: 178.08788999999996
- Max Citation Score: 196.55139
- Similarity Product: 128.68821304346503

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

Dataset: test