The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2001
Filed:
Feb. 18, 1999
Cleaning system and method for cleaning a flow restrictor in a supercritical fluid extraction system
James L. French, Holland, MI (US);
Leco Corporation, St. Joseph, MI (US);
Abstract
A source of oxidizing gas is coupled to a flow restrictor during a cleaning cycle in which the flow restrictor is heated to a temperature for a period of time sufficient to oxidize and remove built up residue from prior analysis. In one embodiment compressed air is supplied at a pressure of from 20 to 40 psi into the flow path for supercritical fluid, while at the same time the flow restrictor is heated to a temperature of from 300° to 400° C. to oxidize and remove built up residue. A heater assembly employs a resistance heater positioned to heat the restrictor for a period of approximately 12 hours, such that the system can be cleaned overnight when analyses are not normally performed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile