PATENT CLAIM ANALYSIS

Application Number: 15749959
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2019-01
Patent Classification: ["148", "580000"]

Abstract:
A high strength spring containing, by mass %, C: 0.40 to 0.50%, Si: 1.00 to 3.00%, Mn: 0.30 to 1.20%, Ni: 0.05 to 0.50%, Cr: 0.35 to 1.50%, Mo: 0.03 to 0.50%, Cu: 0.05 to 0.50%, Al: 0.005 to 0.100%, V: 0.05 to 0.50%, Nb: 0.005 to 0.150%, N: 0.0100 to 0.0200%, P: limited to be less than or equal to 0.015%, S: limited to be less than or equal to 0.010%, and the balance of Fe and inevitable impurities, wherein a Nb-compound including at least one of Nb-carbide, Nb-nitride and Nb-carbonitride is included, and wherein a V-compound including at least one of V-carbide and V-carbonitride that is precipitated around the Nb-compound is included.

Claim (Index 2):
A method of manufacturing a high strength spring, the method comprising:\n performing a quenching process in which quenching temperature is greater than or equal to 950\u00b0 C. and less than or equal to 1000\u00b0 C., and a tempering process in which tempering temperature is greater than or equal to 250\u00b0 C. and less than 390\u00b0 C., on a steel containing, by mass %, C: 0.40 to 0.50%, Si: 1.00 to 3.00%, Mn: 0.30 to 1.20%, Ni: 0.05 to 0.50%, Cr: 0.35 to 1.50%, Mo: 0.03 to 0.50%, Cu: 0.05 to 0.50%, Al: 0.005 to 0.100%, V: 0.05 to 0.50%, Nb: 0.005 to 0.150%, N: 0.0100 to 0.0200%, P: limited to be less than or equal to 0.015%, S: limited to be less than or equal to 0.010%, and the balance of Fe and inevitable impurities, wherein a V-compound including at least one of V-carbide and V-carbonitride is solid-dissolved in Fe at the quenching temperature, and thereafter, the V-compound is precipitated around a Nb-compound including at least one of Nb-carbide, Nb-nitride and Nb-carbonitride.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 88.0
- Lexical Diversity: 2.17808
- Patent Class: 148.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14616064', '13379723', '15308848', '15505678', '13090297']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7840355503979729
- 35 USC 102 Novelty (BERT): 0.510405341233709
- Combined Prediction Score: 0.7566725294815466
- Mean Citation Score: 214.5763
- Max Citation Score: 222.16315
- Similarity Product: 144.1240150320411

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