PATENT CLAIM ANALYSIS

Application Number: 16076712
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-02
Patent Classification: ["428", "586000"]

Abstract:
A steel material for oil country tubular goods that has a high strength and excellent SSC resistance is provided. The steel material according to this invention contains, in mass %, C: more than 0.45 to 0.65%, Si: 0.10 to 1.0%, Mn: 0.1 to 1.0%, P: 0.050% or less, S: 0.010% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Cr: 0.1 to 2.5%, Mo: 0.25 to 5.0%, and Co: 0.05 to 5.0%, and satisfies expressions (1) and (2), and contains 90% or more of tempered martensite by volume ratio: C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15−Co/6+α≥0.70  (1) (3C+Mo+3Co)/(3Mn+Cr)≥1.0  (2) Effective B=B−11(N−Ti/3.4)/14  (3) where, α in expression (1) is 0.250 when effective B (mass %) defined by expression (3) is 0.0003% or more, and is 0 when effective B is less than 0.0003%.

Claim (Index 1):
A steel material comprising a chemical composition consisting of, in mass %,\n C: more than 0.45 to 0.65%, Si: 0.10 to 1.0%, Mn: 0.1 to 1.0%, P: 0.050% or less, S: 0.010% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Cr: 0.1 to 2.5%, Mo: 0.25 to 5.0%, Co: 0.05 to 5.0%, Cu: 0 to 0.50%, Ni: 0 to 0.50%, Ti: 0 to 0.030%, Nb: 0 to 0.15%, V: 0 to 0.5%, B: 0 to 0.003%, Ca: 0 to 0.004%, Mg: 0 to 0.004%, Zr: 0 to 0.004%, and rare earth metal: 0 to 0.004%, with a balance being Fe and impurities, and satisfying expressions (1) and (2), wherein the microstructure comprises, by volume ratio, 90% or more of tempered martensite:\n C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15\u2212Co/6+\u03b1\u22650.70\u2003\u2003(1) \n (3C+Mo+3Co)/(3Mn+Cr)\u22651.0\u2003\u2003(2) \n Effective B=B\u221211(N\u2212Ti/3.4)/14\u2003\u2003(3) \n where, \u03b1 in expression (1) is 0.250 when effective B (mass %) defined by expression (3) is 0.0003% or more, and is 0 when the effective B is less than 0.0003%, where a content (mass %) of a corresponding element is substituted for each symbol of an element in expression (1) to expression (3).

Metadata:
- Claim Count in Document: 44.0
- Percentile: 96.0
- Lexical Diversity: 2.15957
- Patent Class: 428.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16328777', '16076705', '15109139', '14408351', '15505678']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9036208705603764
- 35 USC 102 Novelty (BERT): 0.5797749014753195
- Combined Prediction Score: 0.8712362736518706
- Mean Citation Score: 396.112156
- Max Citation Score: 475.8955
- Similarity Product: 426.3322614423633

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