PATENT CLAIM ANALYSIS

Application Number: 16323112
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-08
Patent Classification: ["148", "553000"]

Abstract:
This free-cutting copper alloy casting contains 75.0-78.5% Cu, 2.95-3.55% Si, 0.07-0.28% Sn, 0.06-0.14% P, 0.022-0.20% Pb, with the remainder being made up of Zn and unavoidable impurities. The composition satisfies the following relations: 76.2≤f1=Cu+0.8×Si−8.5×Sn+P+0.5×Pb≤80.3, 61.2≤f2=Cu−4.4×Si−0.8×Sn−P+0.5×Pb≤62.8. The area ratios (%) of the constituent phases satisfy the following relations: 2.5≤κ65, 0≤γ≤2.0, 0≤β≤0.3, 0≤μ≤2.0, 96.5≤f3=α+κ, 99.2≤f4=α+κ+γ+μ, 0≤f6=γ+μ≤3.0, 29≤f6=κ+6×γ 1/2 +0.5×μ≤66. The long side of the γ phase does not exceed 50 μm, the long side of the μ phase does not exceed 25 μm, and the κ phase is present within the α phase.

Claim (Index 3):
A free-cutting copper alloy casting comprising:\n 75.5 mass % to 77.8 mass % of Cu; 3.1 mass % to 3.4 mass % of Si; 0.10 mass % to 0.27 mass % of Sn; 0.06 mass % to 0.13 mass % of P; 0.024 mass % to 0.15 mass % of Pb; and a balance including Zn and inevitable impurities, wherein a total amount of Fe, Mn, Co, and Cr as the inevitable impurities is lower than 0.08 mass %, when a Cu content is represented by [Cu] mass %, a Si content is represented by [Si] mass %, a Sn content is represented by [Sn] mass %, a P content is represented by [P] mass %, and a Pb content is represented by [Pb] mass %, the relations of\n 76.6\u2264 f 1=[Cu]+0.8\u00d7[Si]\u22128.5\u00d7[Sn]+[P]+0.5\u00d7[Pb]\u226479.6 and \n 61.4 \u2264f 2=[Cu]\u22124.4\u00d7[Si]\u22120.8\u00d7[Sn]\u2212[P]+0.5\u00d7[Pb]\u226462.6 \n are satisfied, in constituent phases of metallographic structure, when an area ratio of \u03b1 phase is represented by (\u03b1)%, an area ratio of \u03b2 phase is represented by (\u03b2)%, an area ratio of \u03b3 phase is represented by (\u03b3)%, an area ratio of \u03ba phase is represented by (\u03ba)%, and an area ratio of \u03bc phase is represented by (\u03bc)%, the relations of\n 30\u2264(\u03ba)\u226456, \n 0\u2264(\u03b3)\u22641.2, \n (\u03b2)=0, \n 0\u2264(\u03bc)\u22641.0, \n 98.0\u2264 f 3=(\u03b1)+(\u03ba), \n 99.5\u2264 f 4=(\u03b1)+(\u03ba)+(\u03b3)+(\u03bc), \n 0\u2264 f 5=(\u03b3)+(\u03bc)\u22641.5, and \n 32\u2264 f 6=(\u03ba)+6\u00d7(\u03b3) 1/2 +0.5\u00d7(\u03bc)\u226458 \n are satisfied, the length of the long side of \u03b3 phase is 40 \u03bcm or less, the length of the long side of \u03bc phase is 15 \u03bcm or less, and \u03ba phase is present in a phase.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 99.0
- Lexical Diversity: 1.67606
- Patent Class: 148.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16325267', '13867872', '13867782', '10597454', '11573640']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8230957215995381
- 35 USC 102 Novelty (BERT): 0.6124126463553274
- Combined Prediction Score: 0.802027414075117
- Mean Citation Score: 412.3883440000001
- Max Citation Score: 596.70605
- Similarity Product: 453.7105245190233

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