PATENT CLAIM ANALYSIS

Application Number: 15899807
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-07
Patent Classification: ["423", "447100"]

Abstract:
Highly purified carbon nanotubes (CNT) having virtually no carbonaceous impurities (amorphous carbon) nor inorganic impurities (metal and metal oxides), and methods of their preparation are described. The purified CNT feature excellent electrical, mechanical, and thermal properties due to the near total absence of detrimental impurities. The CNT starting material is preferably in the form of wafer, film, or buckypaper for efficient diffusion of purifying media. The highly pure CNT are prepared by heat treating a CNT starting material in a specified amount of oxygen, then treating the CNT in a solution comprising water and acid, or further heat treating the CNT in an atmosphere comprising chlorine (Cl 2 ). Extremely low levels of inorganic impurities may be achieved by treating sequentially with a treatment solution followed by chlorine. Removal of chloride from purified CNT may be achieved by further treating the chlorine-treated material in an atmosphere comprising hydrogen (H 2 ).

Claim (Index 1):
A method for purifying carbon nanotubes, comprising the steps of:\n (a) obtaining a carbon nanotube starting material that contains impurities; (b) removing amorphous carbon from the carbon nanotube starting material by heat treating the carbon nanotube starting material between 300 and 550\u00b0 C. for 20 to 80 hours in a heating chamber, wherein the heating chamber contains a specified amount of oxygen and inert gas, and contains less than 1 ppm of water vapor and other reactive species; and (c) removing inorganic impurities from the carbon nanotube starting material by treating the carbon nanotube in an atmosphere comprising chlorine (O 2 ).

Metadata:
- Claim Count in Document: 24.0
- Percentile: 88.0
- Lexical Diversity: 1.86957
- Patent Class: 423.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14663339', '13408884', '14875618', '14875564', '14825021']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.742984917940969
- 35 USC 102 Novelty (BERT): 0.5743691695564658
- Combined Prediction Score: 0.7261233431025187
- Mean Citation Score: 298.703756
- Max Citation Score: 441.23486
- Similarity Product: 437.0465360018802

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

Dataset: test