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:
Jun. 06, 1989
Filed:
Apr. 16, 1986
Michael R Spearman, St. Paul, MN (US);
Patrick R Spearman, Shoreview, MN (US);
Daniel M Spearman, Shoreview, MN (US);
Porous Media Corporation, St. Paul, MN (US);
Abstract
There is disclosed a porous, vacuum formed filter tube having randomly oriented glass fibers and having at least one layer of a suitable sheet material wrapped around said porous filter tube and being in intimate contact therewith, said disclosed combination having an outer support structure of a predetermined inside diameter sufficient to compress the assembly of said porous filter tube and said material when it is slipped thereover, thus providing compression from the outside to the inside and forcing the layer of sheet material into intimate contact at virtually all points with said porous filter tube.