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:
Nov. 13, 1996
Dennis E McCabe, Middleton, WI (US);
PowderJect Vaccines, Inc., Madison, WI (US);
Abstract
Particles coated with biological substances are deposited onto the concave inner surface of a length of tubing by a process which includes preparing a uniform suspension of coated particles and introducing the particles into the tubing while rotating horizontally. Then the speed of rotation is increased to drive the particles out of suspension and against the inner surface. After particle separation, the rotational speed is decreased and a gas is passed through the tubing to blow out the separated liquid. Next both the speed of rotation and the gas flow rate are increased to dry the particles that have been deposited against the inner surface of the tubing. An apparatus for performing the method also is disclosed.