PATENT CLAIM ANALYSIS

Application Number: 15772643
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-11
Patent Classification: ["508", "421000"]

Abstract:
An object of the present invention is to obtain a lubricating oil for machine tools, which has good lubricating properties and abrasion resistance and also exhibits a high flash point and a low pour point. A lubricating oil composition comprises, as a base oil, a base oil which includes an oil containing 20 mass % to 49 mass % of n-paraffin components and 51 mass % to 80 mass % of i-paraffin components at a quantity of 90 mass % or more of the total quantity of the base oil and which has a kinematic viscosity at 40° C. of 1 to 5 mm 2 /s. By blending a small quantity of β-dithiophosphorylated propionic acid and/or an acidic phosphoric acid ester in this base oil, a lubricating oil composition suitable for use for a main shaft of a machine tool is obtained. The lubricating oil composition for a main shaft of a machine tool has a flash point of 100° C. or more, a pour point of −10° C. or less, and a Shell four-ball wear mark diameter of 0.7 mm or less.

Claim (Index 1):
A lubricating oil composition for a main shaft of a machine tool, the composition comprising a base oil, which includes an oil containing 20 mass % to 49 mass % of n-paraffin components and 51 mass % to 80 mass % of i-paraffin components at a quantity of 90 mass % or more of the total quantity of the base oil, and which has a kinematic viscosity at 40\u00b0 C. of 1 to 5 mm 2 /s, wherein the base oil contains at least one component selected from among \u03b2-dithiophosphorylated propionic acid represented by formula 1 below and an acidic phosphoric acid ester represented by formula 2 below: wherein, in formula 1, R 1  represents a branched alkyl group having 3 to 8 carbon atoms, and R 2  represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and in formula 2, m denotes an integer of 1 or 2, and R represents a straight chain or branched chain hydrocarbon having 6 to 22 carbon atoms.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 93.0
- Lexical Diversity: 2.12088
- Patent Class: 508.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14279500', '13317925', '13122828', '12307375', '12078308']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8069387072963236
- 35 USC 102 Novelty (BERT): 0.5241653389880926
- Combined Prediction Score: 0.7786613704655005
- Mean Citation Score: 185.766278
- Max Citation Score: 191.18596
- Similarity Product: 147.81948692080738

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