PATENT CLAIM ANALYSIS

Application Number: 15763590
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["560", "170000"]

Abstract:
The present invention makes it possible to provide a high-purity carboxylic acid ester in which the Ag, Al, Au, Ca, Cr, Cu, Fe, K, Mg, Na, Sn, and Zn contents as metal impurity contents are each less than 1 ppb and the anionic impurity content is less than 1 ppm. The present invention also makes it possible to provide a method for producing a high-purity carboxylic acid ester, the method including a step for bringing a crude carboxylic acid ester that contains anionic impurities and Ag, Al, Au, Ca, Cr, Cu, Fe, K, Mg, Na, Sn, and Zn as metal impurities into contact with a cation-exchange resin (II), followed by a step for bringing the crude carboxylic acid ester into contact with an anion-exchange resin (III).

Claim (Index 4):
The method for producing a high-purity carboxylic acid ester according to  claim 2 , wherein the carboxylic acid ester is at least one selected from the group consisting of methyl lactate, ethyl lactate, propyl lactate, methyl \u03b1-hydroxyisobutyrate, ethyl \u03b1-hydroxyisobutyrate, propyl \u03b1-hydroxyisobutyrate, butyl \u03b1-hydroxyisobutyrate, methyl \u03b2-hydroxyisobutyrate, ethyl \u03b2-hydroxyisobutyrate, propyl \u03b2-hydroxyisobutyrate and butyl \u03b2-hydroxyisobutyrate.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 2.26087
- Patent Class: 560.0
- Transitional Phrase Type: closed
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14409827', '12936304', '11547124', '13519491', '15538621']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7438394741634232
- 35 USC 102 Novelty (BERT): 0.5201419611443585
- Combined Prediction Score: 0.7214697228615167
- Mean Citation Score: 181.735078
- Max Citation Score: 211.93477
- Similarity Product: 146.54894126413106

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