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:
Sep. 14, 1993
Filed:
Jul. 23, 1992
Applicant:
Inventors:
Richard D Rheutan, Jr, Richmond, VA (US);
Harold F Staunton, Avondale, PA (US);
Christopher R Whitfield, Richmond, VA (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B06B / ; D01D / ; D01D / ; D01D / ;
U.S. Cl.
CPC ...
264 23 ; 264 85 ; 264180 ; 2642108 ; 26421114 ; 264233 ;
Abstract
More uniform and more rapid quenching and coagulation of filaments is achieved by contacting the filaments in a chamber with coagulating liquid and generating pressure fluctuations in the liquid at high frequency sonic or ultrasonic frequencies.