PATENT CLAIM ANALYSIS

Application Number: 16035232
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2018-11
Patent Classification: ["526", "271000"]

Abstract:
The present invention relates to a method for the preparation of a sulfur-free copolymer comprising at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol by solution polymerization in the presence of a radical initiator.

Claim (Index 1):
A sulfur-free copolymer, comprising as copolymerized units one or more alkyl methacrylates and maleic anhydride;\n wherein a number average molecular weight of the copolymer is in the range of 3000 to 9000 g/mol, the number average molecular weight being determined by gel permeation chromatography against poly(methyl methacrylate) standards, a polydispersity index of the copolymer is in the range of 1 to 5, the polydispersity index being determined by gel permeation chromatography against poly(methyl methacrylate) standards, and a molar ratio of the one or more alkyl methacrylates to the maleic anhydride in the sulfur-free copolymer is in the range of from 10:1 to 1:1, based on the total molar amounts of the one or more alkyl methacrylates and maleic anhydride used for the preparation of the sulfur-free copolymer; and wherein the sulfur free copolymer is obtained by a process, comprising: said method comprising: a) providing an initial reaction solution comprising a portion of the one or more alkyl methacrylates, a portion of the maleic anhydride, a portion of the initiator and a portion of the solvent; b) adding a first feed solution comprising a further portion of the maleic anhydride and a further portion of the solvent to the initial reaction solution, and without any initiator; and c) adding a second feed solution comprising a further portion of the one or more alkyl methacrylates, and a portion of the radical initiator to the initial reaction solution, wherein the additions of both first and second feed solutions are started at the same time, and the duration of the additions of the first and second feed solutions are adjusted such that addition of the first feed solution is completed faster than the addition of the second feed solution.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 95.0
- Lexical Diversity: 1.18421
- Patent Class: 526.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15537180', '14892111', '10784425', '11805949', '15100762']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7372071597886206
- 35 USC 102 Novelty (BERT): 0.523712765434022
- Combined Prediction Score: 0.7158577203531608
- Mean Citation Score: 262.10668
- Max Citation Score: 359.80145
- Similarity Product: 250.4815500977993

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 0
- Claim Label 112: 0
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test