PATENT CLAIM ANALYSIS

Application Number: 16088954
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-07
Patent Classification: ["313", "143000"]

Abstract:
A spark plug for an internal combustion engine that can improve bonding strength between a center electrode and a conductive glass is provided. The spark plug includes a housing, an insulator, a center electrode, a ground electrode, and a conductive glass. The center electrode has a locking portion that is locked from a base end side to a step portion formed on an inner peripheral surface of the insulator, and an electrode head that is closer to the base end side than the locking portion is. A concave portion is partially formed on the tip end surface of the electrode head. A concave contour, which is an outer peripheral contour of the concave portion when viewed in a plug axial direction, forms a closed curve which is spaced apart from a head contour, which is an outer peripheral contour of the base end surface of the electrode head, and surrounds a center axis (B) of the center electrode. The concave contour has an outward portion protruding toward the head contour and an inward portion protruding toward the center axis (B) of the center electrode.

Claim (Index 8):
The spark plug for an internal combustion engine according to  claim 7 , wherein\n the concave contour includes N of the outward portions and N of the inward portions alternately arranged in a circumferential direction, a 1st outward portion to an Nth outward portion are sequentially arranged in the circumferential direction, and a 1st inward portion to an Nth inward portion are sequentially arranged in the circumferential direction, a kth outward portion and a kth inward portion are adjacent to each other, and when Rk is a radius of a circumscribed circle of the kth outward portion centering on the central axis, and rk is a radius of an inscribed circle of the kth inward portion centering on the central axis B, a following expression is satisfied, where N is a natural number of 2 or more, k is a natural number of 1 to N, A=1.0 when N=2, and A=4.1 when N\u22653: [ Expression \ue89e \ue89e 1 ] \u2211 k = 1 N \ue89e Rk - rk Rk \u00d7 N 0.9 \u2265 A . ( Expression \ue89e \ue89e 1 )

Metadata:
- Claim Count in Document: 8.0
- Percentile: 97.0
- Lexical Diversity: 2.74324
- Patent Class: 313.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['11714127', '14238559', '14131937', '13395902', '16037332']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7418754248169235
- 35 USC 102 Novelty (BERT): 0.4867016465244647
- Combined Prediction Score: 0.7163580469876776
- Mean Citation Score: 224.139778
- Max Citation Score: 242.93466
- Similarity Product: 173.9383689744115

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