PATENT CLAIM ANALYSIS

Application Number: 15918670
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["536", "095000"]

Abstract:
Provided is a method for producing hydroxypropyl methyl cellulose (HPMC) having high hydroxypropoxy content, low ash content, and low insoluble fiber content. More specifically, provided is a method for producing HPMC having a methoxy degree of substitution of from 1.4 to 2.2 and a hydroxypropoxy molar substitution of from 0.5 to 1.0, including steps of: bringing sheet-like or chip-like pulp into contact with an alkali metal hydroxide solution to obtain a reaction product mixture containing alkali cellulose, removing a liquid portion from the reaction product mixture to obtain the alkali cellulose, reacting the alkali cellulose with an etherifying agent to obtain a crude HPMC, disintegrating the crude HPMC into a disintegrated crude HPMC, dispersing the disintegrated crude HPMC in water to obtain a slurry, filtering the slurry to obtain a cake, and washing the cake.

Claim (Index 1):
A method for producing hydroxypropyl methyl cellulose having a methoxy degree of substitution (DS) of from 1.4 to 2.2 and a hydroxypropoxy molar substitution (MS) of from 0.5 to 1.0, comprising steps of:\n bringing sheet-like or chip-like pulp into contact with an alkali metal hydroxide solution to obtain a reaction product mixture containing alkali cellulose, removing a liquid portion from the reaction product mixture to obtain the alkali cellulose, reacting the obtained alkali cellulose with an etherifying agent to obtain crude hydroxypropyl methyl cellulose, disintegrating the crude hydroxypropyl methyl cellulose to obtain disintegrated crude hydroxypropyl methyl cellulose, dispersing the disintegrated crude hydroxypropyl methyl cellulose in water to obtain a slurry, filtering the slurry to obtain a cake, and washing the cake.

Metadata:
- Claim Count in Document: 22.0
- Percentile: 90.0
- Lexical Diversity: 2.0
- Patent Class: 536.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14079704', '15722594', '14305174', '15853164', '14447846']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6126625761505723
- 35 USC 102 Novelty (BERT): 0.5012016696777385
- Combined Prediction Score: 0.601516485503289
- Mean Citation Score: 225.512824
- Max Citation Score: 284.8164700000001
- Similarity Product: 220.7983542092336

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