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. 24, 1985
Filed:
Feb. 24, 1983
Yun C Jao, Elkhart, IN (US);
Ivan C Good, Goshen, IN (US);
Miles Laboratories, Inc., Elkhart, IN (US);
Abstract
Spherically shaped bacterial cell aggregates are produced by spheronizing extruded flocculated cells. The cells are flocculated from aqueous medium with a cross-linked polyamine which is the reaction product of an epihalohydrin/polyamine copolymer and a cross-linking agent. Prior to being extruded, a filter cake having 68 to 76 weight percent water is produced by filtration of the flocculated cells, and the filter cake is ground into particles no greater than 60 mesh. Spheronizing is with a plate rotating at a tangential velocity of 4.5 to 12 meters per second within a cylinder containing the plate. Toughness of the spherical aggregates produced can be increased by the addition of a binder after filtration and before extrusion. During spheronizing, fines may be produced. These fines can be recycled by mixing them with the wet filter cake and binder before extrusion.