PATENT CLAIM ANALYSIS

Application Number: 15751157
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["277", "442000"]

Abstract:
A piston ring in which carbon films with film qualities optimized to be adapted to required performance are formed on an outer circumferential sliding surface and top and bottom surfaces thereof with good productivity is provided, and a high-performance engine which employs the piston ring is also provided. In the piston ring, a carbon film is formed on an outer circumferential sliding surface and top and bottom surfaces. The carbon film contains a stacking of at least two types of carbon film layers with different film qualities, and a thickness ratio of the two types of carbon film layers is different between the outer circumferential sliding surface and the top and bottom surfaces.

Claim (Index 11):
The piston ring according to  claim 1 , wherein a metal layer containing titanium or chromium is formed on a surface of the piston ring using sputtering before the carbon film is formed.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 88.0
- Lexical Diversity: 2.16364
- Patent Class: 277.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['15751155', '15511694', '15116883', '12199470', '14768786']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8070984061164093
- 35 USC 102 Novelty (BERT): 0.4991296058283196
- Combined Prediction Score: 0.7763015260876004
- Mean Citation Score: 209.819864
- Max Citation Score: 243.83981
- Similarity Product: 163.46687152796744

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