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:
Aug. 21, 2001
Filed:
May. 28, 1998
Applicant:
Inventors:
Assignee:
Toray Industries, Inc., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 6/102 ; B01D 6/108 ;
U.S. Cl.
CPC ...
B01D 6/102 ; B01D 6/108 ;
Abstract
A reverse osmosis membrane element is provided that can treat a raw liquid throughout a wide raw liquid pressure range from a low pressure to a high pressure, comprising a reverse osmosis membrane, a permeated liquid passage conduit provided on one surface of the reverse osmosis membrane, and arranged to face it, and a water permeable fabric provided between the reverse osmosis membrane and the permeated liquid passage conduit; it is preferable that the water permeable fabric has an average surface roughness of 2-2 &mgr;m, that is has a pure water permeation coefficient of 0.5-5.0 m,/(m,.MPa.min) and that it is a nonwoven fabric.