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:
Oct. 16, 1990
Filed:
Mar. 10, 1989
Terumo Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid filtering device for separating leukocytes from blood to produce concentrated red cells, for example, includes a housing having a liquid inlet port and a liquid outlet port and providing a flow passage from the liquid inlet port to the liquid outlet port, a partition plate fixedly disposed in the housing, a first filter element disposed in the housing in an upstream position with respect to the flow passage, and a second filter element disposed in the housing in a downstream position with respect to the flow passage, the second filter element being made of a material having a larger filtration resistance than the first filter element. The second filter element has an outer peripheral edge fixed directly to the partition plate in a liquidtight manner in surrounding relation to the first filter element.