PATENT CLAIM ANALYSIS

Application Number: 15745063
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["420", "038000"]

Abstract:
The present disclosure relates to a martensitic stainless steel suitable for rock drill steel rods. Furthermore, the present disclosure also relates to the use of the martensitic stainless steel and to products manufactured thereof, especially drill rods.

Claim (Index 1):
A martensitic stainless steel comprising in weight % (wt %):\n C 0.21 to 0.27; Si less than or equal to 0.7; Mn 0.2 to 2.5; P less than or equal to 0.03; S less than or equal to 0.05; Cr 11.9 to 14.0; Ni more than 0.5 to 3.0; Mo 0.4 to 1.5; N less than or equal to 0.060; Cu less than or equal to 1.2; V less than or equal to 0.06; Nb less than or equal to 0.03; Al less than or equal to 0.050; Ti less than or equal to 0.05; balance Fe and unavoidable impurities; wherein the martensitic stainless steel comprises more than or equal to 75% martensite phase and less than or equal to 25% retained austenite phase and wherein said martensitic stainless steel has a PRE-value more than or equal to 14; and wherein the chemical composition of the said martensitic stainless steel is within an area formed in a Schaeffler diagram, which diagram is based on the following equations:\n Cr eq =Cr+Mo+1.5*Si+0.5*Nb( x -axis) \n Ni eq =Ni+0.5*Mn+30*N+30*C( y -axis); \n wherein the values of Cr, Mo, Si, Nb, Ni, Mn, N and C are in weight %; and which area of the martensitic stainless steel is defined by the following coordinates: Cr eq Ni eq A1 12.300 9.602 B1 12.300 11.990 B4 15.702 9.199 A3 14.482 7.864.

Metadata:
- Claim Count in Document: 32.0
- Percentile: 86.0
- Lexical Diversity: 1.57692
- Patent Class: 420.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14761121', '10443821', '10798855', '14798897', '11335676']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7413460664831303
- 35 USC 102 Novelty (BERT): 0.5105918045432283
- Combined Prediction Score: 0.71827064028914
- Mean Citation Score: 278.281606
- Max Citation Score: 283.7517
- Similarity Product: 213.9199475727797

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