Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method and kit for testing polyolester lubricants used in refrigerant compressors

Method and kit for testing polyolester lubricants used in refrigerant compressors

US Patent 5707871 · Granted Jan 13, 1998

Estimated economic value: $178,862,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Cascade heat transfer system2022
Sorption system in a transport refrigeration system2020
Cascade heat transfer system2020
Conductive polymer compositions, electrical devices and methods of making1999
Amorphous metal tagging system for underground structures including elongated pa1996
Method for determining the relative amount of deformation induced in a sealing c1995
Assembly for evaluating gasket service life and method for performing the same1994
Method for determining the thickness of a material by means of a radiant energy 1994
Method for detecting low levels of alkylbenzene or mineral oil in polyol ester l1994
Method for detecting low levels of alkylbenzene or mineral oil in polyol ester l1994
Quick method to distinguish alkylbenzene and naphthenic lubricants in compressor1994
Method of operating a transport refrigeration unit1993