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US 2015/0309004 A1Published application
Colorimetric oil testing apparatus and system
OwnerRichard C. Harpmaninventor
Life of this patent
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Abstract
A motor vehicle oil quality testing apparatus and system to assess the quality and viability of motor oil in a vehicle to determine if a change of oil is needed. An absorbent strip of chemically treated material is mounted on a self-contained single use display and test card on which a used oil sample is deposited and will change color based on the oil's determined alkalinity in a sealable color comparison chamber indicated to the user if the oil should be changed.
Claims7
A test strip carrier and display for an oil testing strip comprises,
- a thin base sheet of non-porous support and display material,
- a transparent central viewing portion of said base sheet,
- an oil test strip secured over said transparent central surface of said base sheet,
- at least one color test comparison surface on said base sheet adjacent said transparent viewing portion,
- an adhesive on a portion of said base sheet inwardly from an edge of said base sheet,
- a fold line extending transversely across said test strip and said base sheet.
3 more elements
Dependencies are inferred from the claim text.