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Patent applications and USPTO patent grants for Purvey; Ronald J..The latest application filed is for "centrifugal separator with weight thrust bearing".
Patent | Date |
---|---|
Centrifugal separator with weight thrust bearing Grant RE39,704 - Purvey June 26, 2 | 2007-06-26 |
Centrifugal separator with vortex disruption vanes Grant 6,196,962 - Purvey , et al. March 6, 2 | 2001-03-06 |
Centrifugal separator with weight thrust bearing Grant 6,095,964 - Purvey August 1, 2 | 2000-08-01 |
Liquid cleaning system including back-flushing filter and centrifugal cleaner therefor Grant 5,906,733 - Purvey May 25, 1 | 1999-05-25 |
Centrifugal filters Grant 4,871,458 - Purvey October 3, 1 | 1989-10-03 |
Disposable cartridges for centrifugal separators Grant 4,787,975 - Purvey November 29, 1 | 1988-11-29 |
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