PATENT CLAIM ANALYSIS

Application Number: 16313071
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-07
Patent Classification: ["423", "415100"]

Abstract:
The process comprises the following steps: mixing lamellar graphite, containing an intercalating material, with NaNO3 and adding the mixture to a solution of H2SO4 (98%) under continuous stirring; cooling the mixture in an ice bath; adding, very slowly, from 2% to 10% of KMnO4, during a period of time up to 1 h, maintaining the stirring; removing the mixture from the ice bath, heating it and maintaining it under stirring, until the formation of graphene oxide; diluting the mixture in deionized water until the volume of the solution has increased at least 30% and the temperature has not exceeded about 60° C.; leaving the mixture to stand for completing the reaction; heating the mixture between 95° C. and 100° C. and keeping it under high stirring. Adding deionized water and hydrogen peroxide to the mixture, for completion of the oxidation reaction; purifying the mixture by washing it with a solution of HCl and, then, with deionized water, for removing the acids: and filtering and drying the mixture for obtaining the graphene oxide in powder with a conversion degree higher than 90%.

Claim (Index 1):
A process for obtaining graphene oxide, characterized in that it comprises the steps of:\n Mixing a powder starting material, defined by lamellar graphite, having an intercalating material separating the structural lamellas thereof, with the same amount of NaNO 3 , and adding the mixture to a solution of H 2 SO 4  (98%) under continuous stirring, during a period from 1 hour to 2 hours; Cooling the mixture in an ice bath, in order to lower its temperature and keep it between 20\u00b0 C. and 25\u00b0 C.; Adding, very slowly, from 2% to 10% of an oxidant defined by KMnO 4 , for a period of time of up to 1 h, maintaining the stirring to prevent the temperature from increasing rapidly and from surpassing an increase of 10%. Removing the mixture from the ice bath, heating it and maintaining it under stirring, until it presents physical properties indicating the formation of graphene oxide; Diluting the mixture by slowly adding deionized water, until reaching an increase of at least 30% in volume of the original solution, causing a temperature increase reaching an average of 60\u00b0 C.; leaving the mixture to stand up to 24 h for completion of the reaction. Heating the mixture until reaching a temperature between 95\u00b0 C. and 100\u00b0 C. and maintaining the mixture in said temperature under high stirring; Adding water to the mixture, until the solution reaches three times its original volume, and also adding to the latter a sufficient amount of hydrogen peroxide for completion of the oxidation reaction; Purifying the mixture by washing it with HCl solution for reducing the pH thereof and, subsequently, by washing it with deionized for reducing the acids; and filtering and drying the mixture, under vacuum, and at room temperature, in order to obtain the graphene oxide in powder form presenting a conversion degree higher than 90%.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 98.0
- Lexical Diversity: 2.04854
- Patent Class: 423.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14612380', '12231417', '15221386', '12231411', '12231413']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7238185993745825
- 35 USC 102 Novelty (BERT): 0.4756016937325789
- Combined Prediction Score: 0.6989969088103821
- Mean Citation Score: 142.520052
- Max Citation Score: 160.23305
- Similarity Product: 123.45027294573784

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

Dataset: test