PATENT CLAIM ANALYSIS

Application Number: 15927682
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-07
Patent Classification: ["560", "191000"]

Abstract:
2-Acetoxyalkanoic acid esters are made in a reaction of a 3,6-dialkyl-1,4-dioxane-2,5-dione or a poly(α-hydroxyalkanoic acid), an acetate ester and an alcohol or phenol in the presence of a transesterification catalyst. Unlike previous methods for making 2-acetoxyalkanoic acid esters, this process proceeds in high yield and high selectivity to the desired product.

Claim (Index 1):
A process for making a 2-acetoxyalkanonic acid ester comprising heating a mixture of an 3,6-dialkyl-1,4-dioxane-2,5-dione, in which the alkyl groups at the 3 and 6 position may be unsubstituted or inertly substituted, with an excess of acetate ester having the structure to a temperature of at least 150\u00b0 C. under superatmospheric pressure in the presence of at least 0.1 mole per mole of the 3,6-dialkyl-1,4-dioxane-2,5-dione of an alkanol or phenol having the structure R 1 \u2014OH and in the presence of a transesterification catalyst to convert at least a portion of the 3,6-dialkyl-1,4-dioxane-2,5-dione to a 2-acetoxyalkanoic acid ester having the structure wherein R is an unsubstituted or inertly substituted alkyl group corresponding to the alkyl groups at the 3 and 6 positions of the starting 3,6-dialkyl-1,4-dioxane-2,5-dione and R 1  in each instance is alkyl or aryl.

Metadata:
- Claim Count in Document: 23.0
- Percentile: 90.0
- Lexical Diversity: 1.38095
- Patent Class: 560.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15120498', '15120495', '12770591', '10888225', '14040530']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7095717898006322
- 35 USC 102 Novelty (BERT): 0.6033598024691316
- Combined Prediction Score: 0.6989505910674821
- Mean Citation Score: 286.493768
- Max Citation Score: 469.96533
- Similarity Product: 428.45473472481245

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