PATENT CLAIM ANALYSIS

Application Number: 15973338
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-08
Patent Classification: ["428", "448000"]

Abstract:
The present disclosure provides a polyimide film prepared from a precursor composition containing a polyamic acid and an organic solvent and having a value of (first FWHM−second FWHM)/(first FWHM+second FWHM) which is less than 0.4, a graphite sheet prepared from the polyimide film, and a method for preparing a graphite sheet.

Claim (Index 10):
A method for preparing a graphite sheet, comprising:\n preparing a polyimide film having a value of the following Formula 1 less than 0.4; carbonizing the polyimide film; and obtaining a graphite sheet by graphitizing the carbonized polyimide film, wherein the graphite sheet has a thermal conductivity of 1400 W/m\u00b7K or more:\n (first FWHM\u2212second FWHM)/(first FWHM+second FWHM) \u2003\u2003Formula 1 \n wherein, when a diffraction peak of (010) plane according to XRD analysis of the polyimide film is in the form of a single peak, the first FWHM(full width at half maximum) indicates a FWHM of the single peak; and when the diffraction peak of (010) plane is in the form of a plurality of single peaks or in the form of a plurality of single peaks overlapped with each other, the first FWHM indicates an average of individual FWHMs of the single peaks, and when a diffraction peak of (102) plane according to XRD analysis of the polyimide film is in the form of a single peak, the second FWHM indicates a FWHM of the single peak; and when the diffraction peak of (102) plane is in the form of a plurality of single peaks or in the form of a plurality of single peaks overlapped with each other, the second FWHM indicates an average of individual FWHMs of the single peaks, wherein the preparation of a polyimide film satisfies the following process conditions (a) to (c): (a) a viscosity of a precursor composition containing a polyamic acid and an organic solvent is from 55,000 cP to 900,000 cP; (b) a heat treatment for heating and drying the precursor composition after casting the precursor composition is conducted at a temperature of from 150 degrees C. to 200 degrees C.; and (c) a film intermediate prepared by the heat treatment is stretched at least once to obtain the polyimide film.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 93.0
- Lexical Diversity: 1.46341
- Patent Class: 428.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['11674620', '14583009', '14172532', '13262253', '15866547']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8733891946427983
- 35 USC 102 Novelty (BERT): 0.4958301385686446
- Combined Prediction Score: 0.8356332890353829
- Mean Citation Score: 199.51358600000003
- Max Citation Score: 206.9377
- Similarity Product: 142.3312176460147

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