PATENT CLAIM ANALYSIS

Application Number: 15759855
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-08
Patent Classification: ["528", "388000"]

Abstract:
Provided is a method of producing polyarylene sulfide at low cost while productivity enhancement and resource saving are attempted by avoiding the use of a complicated step and special apparatus (facility). 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 in an amount less than an equimolar amount relative to an amount of the sulfur source; a first-stage polymerization step of initiating a polymerization reaction by heating the mixture, and producing a prepolymer having a dihalo aromatic compound conversion ratio of 50% or greater; and a second-stage polymerization step of adding an alkali metal hydroxide such that the alkali metal hydroxide is in an amount of 1.00 to 1.10 mol per 1 mol of the sulfur source, and continuing the polymerization reaction in a homogeneous liquid phase condition.

Claim (Index 2):
The method according to  claim 1 , wherein, in the preparation step, the mixture containing from 0.5 to 0.99 mol of the alkali metal hydroxide per 1 mol of the sulfur source is prepared.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 90.0
- Lexical Diversity: 1.9
- Patent Class: 528.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15759540', '15300404', '15761120', '15763243', '13055430']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7874346944142899
- 35 USC 102 Novelty (BERT): 0.4792359542230618
- Combined Prediction Score: 0.7566148203951671
- Mean Citation Score: 258.401
- Max Citation Score: 268.82956
- Similarity Product: 266.5131241061425

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