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:
Mar. 31, 1998
Filed:
Jun. 20, 1996
Keith P Johnston, Austin, TX (US);
Steven Paul Wilkinson, Coopersburg, PA (US);
Mark Leonard O'Neill, Austin, TX (US);
Lloyd Mahlon Robeson, Macungie, PA (US);
Simon Mawson, Austin, TX (US);
Richard Henry Bott, Macungie, PA (US);
Carrington Duane Smith, Quakertown, PA (US);
Board of Regents, The University of Texas System, Austin, TX (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
Heterogeneous polymer mixtures comprising a polymer in liquid or supercritical CO.sub.2 are stabilized by employing a poly(propylene oxide) or poly(butylene oxide) based surfactant. These surfactants are especially well suited for stabilizing heterogeneous polymer mixtures formed by micronizing techniques as well as by precipitation of a compressed fluid antisolvent applications.