PATENT CLAIM ANALYSIS

Application Number: 15759540
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-05
Patent Classification: ["528", "387000"]

Abstract:
The present invention is to provide a method of producing polyarylene sulfide that can produce polyarylene sulfide having a low halogen content simply and easily and at low cost. The method of producing polyarylene sulfide according to an embodiment of the present invention includes: a preparation step of preparing a mixture containing an organic amide solvent, a sulfur source, a dihalo aromatic compound, and an alkali metal hydroxide; a first-stage polymerization step of producing a prepolymer until a pH of a reaction system reaches a range of lower than 10 but 7 or higher by initiating a polymerization reaction by heating the mixture; and a second-stage polymerization step of continuing the polymerization reaction.

Claim (Index 2):
The method according to  claim 1 , wherein\n in the preparation step, a mixture containing the alkali metal hydroxide in an amount that is less than an equimolar amount per 1 mol of the sulfur source is prepared; and in the second-stage polymerization step, the polymerization reaction is continued by adding from 0.01 to 0.6 mol of alkali metal hydroxide per 1 mol of the sulfur source.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 90.0
- Lexical Diversity: 1.72857
- Patent Class: 528.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15300404', '15759855', '15761120', '15763243', '13055430']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7928764183378947
- 35 USC 102 Novelty (BERT): 0.5174424087072087
- Combined Prediction Score: 0.7653330173748261
- Mean Citation Score: 316.484568
- Max Citation Score: 329.1164
- Similarity Product: 238.6470229959488

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