MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202617079957 A) filed by The Lubrizol Corporation on June 29, 2026, for Methods Of Measuring Effects Of Fine Filtration Conditions On Lubricant Defoam Retention Properties.
Inventors include Hobson, David M.; Choo, Lindsey; Bowler, Joe; West, Victoria; Rollisson, Lee; and Bell, Ian.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: Test methods for assessing lubricant performance, including defoaming and filter-ability, are disclosed. The methods include the utilization of a filtration test rig comprising a heated tank equipped with a temperature sensor and wherein the heated tank is fluidly connected to a circulating pump and a filter housing equipped with a filter having a pore size equal to or less than 25 microns. The heated tank is then filled with the lubricant to at least 50% capacity and the lubricant is heated to at least 80 ?. The lubricant is then circulated through the filtration test rig using the circulation pump so that the lubricant passes through the 25-micron (or less) filter at least 5,000 times. A sample of the filtered lubricant is then obtained and its defoam properties are measured using ASTM D892.
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