PATENT CLAIM ANALYSIS

Application Number: 15744609
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["428", "066600"]

Abstract:
To provide a piston ring free from microwelding to a piston while exhibiting excellent wear resistance in side surfaces, for a long period of use in a high-temperature, high-pressure environment, and its production method, a nitride layer is formed on at least one of upper and lower side surfaces of the piston ring, and then subjected to a phosphate chemical conversion treatment, such that the nitride layer has at least one of granular and vermicular surface forms.

Claim (Index 4):
The piston ring according to  claim 1 , wherein a phosphate chemical conversion coating is formed on said nitride layer.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 86.0
- Lexical Diversity: 1.52727
- Patent Class: 428.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15113631', '12196317', '15116883', '15557797', '10531423']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9043519790549572
- 35 USC 102 Novelty (BERT): 0.493945950480076
- Combined Prediction Score: 0.863311376197469
- Mean Citation Score: 211.45601
- Max Citation Score: 252.47289
- Similarity Product: 198.40455361431785

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