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US 5,313,824 AGranted
Lubricating oil analysis method and kit
AssigneeHerguth Laboratories
InventorsWilliam R. Herguth, Peter Yates
Life of this patent
Estimating the term…
Abstract
An apparatus for analyzing lubricating oil is disclosed in the form of a test medium upon which an oil sample is placed, and comparative visual indicia which the user consults to provide a qualitative analysis of the oil sample. A method for the use of the apparatus is also disclosed.
Claims12
A test kit for the analysis of lubricating oil, comprising:
- a test medium capable of absorbing the oil;
- a plurality of comparative visual indicia depicting at least two different conditions of lubricating oil disposed upon said test medium;
- and
- a descriptive text corresponding to said comparative visual indicia.
1 more element
A method for analysis of lubricating oil, comprising the steps of:
- obtaining a sample of said lubricating oil;
- disposing said sample upon a test medium capable of absorbing said lubricating oil;
- maintaining said test medium in a selected position for an effective time to develop a spot on said test medium;
- visually comparing said spotted test medium against a plurality of comparative visual indicia depicting lubricating oil in at least two different conditions;
- and,
- selecting one of the plurality of comparative indicia which most closely resembles said spotted test medium.
3 more elements
A test kit for the analysis of lubricating oil, comprising:
- a test medium capable of absorbing the oil;
- a first visual indicium depicting lubricating oil in acceptable condition;
- a second visual indicium depicting lubricating oil at the limit of useful life, indicating an oil change is due;
- a third visual indicium depicting lubricating oil in a condition indicating an oil change is overdue;
- and
- descriptive means corresponding to the first, second, and third visual indicia for informing a user of the particular condition of the lubricating oil.
3 more elements
Dependencies are inferred from the claim text.