PATENT CLAIM ANALYSIS

Application Number: 15763243
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-10
Patent Classification: ["528", "388000"]

Abstract:
The present invention is to provide a method of producing highly pure polyarylene sulfide (PAS) while the produced amount per unit volume is enhanced and side reactions are suppressed. The method of producing PAS according to an embodiment of the present invention, the method including: a preparation step of preparing a mixture containing an organic amide solvent, a sulfur source, water, a dihalo aromatic compound, and an alkali metal hydroxide in an amount that is less than an equimolar amount per 1 mol of the sulfur source; a first-stage polymerization of heating the mixture; an alkali addition step of adding the alkali metal hydroxide, in an amount that is not less than an equimolar amount per 1 mol of the sulfur source, into the mixture that has undergone the first-stage polymerization step; a concentration step of removing at least a part of the organic amide solvent and/or at least a part of the water in the mixture that has undergone the first-stage polymerization step; and a second-stage polymerization step of heating the mixture that has undergone the alkali addition step and the concentration step and continuing the polymerization reaction.

Claim (Index 8):
The method according to  claim 1 , wherein in the second-stage polymerization step, the organic amide solvent and/or the water is removed in the concentration step until a weight of the reaction mixture relative to an amount of the sulfur source becomes 500 g/mol or less.

Metadata:
- Claim Count in Document: 14.0
- Percentile: 90.0
- Lexical Diversity: 2.5625
- Patent Class: 528.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15300404', '15759855', '15761120', '15759540', '15540636']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7784357278032914
- 35 USC 102 Novelty (BERT): 0.5399418729211963
- Combined Prediction Score: 0.7545863423150818
- Mean Citation Score: 371.598384
- Max Citation Score: 385.99683
- Similarity Product: 272.70199551103593

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

Dataset: test