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:
Dec. 22, 1992
Filed:
Oct. 01, 1990
John Hughes, Long Grove, IL (US);
American Colloid Company, Arlington Heights, IL (US);
Abstract
An article of manufacture including an elongate confined mass of a water-swellable clay for sealing joints or seams between adjacent water-barrier materials or for plugging defects or other unsealed areas adjacent to a water-barrier layer. The elongate, confined mass of water-swellable clay is manufactured in any desired cross-sectional shape or configuration e.g. circular, eliptical, rectangular, square, and the like and can be manufactured in roll form for dispensing individual confined masses of water-swellable clay individually. The water-swellable clay is confined within a layer of material that permits the entrance of water to contact the water-swellable clay for hydration of the clay, such as by being water-porous or water-soluble and such that upon sufficient hydration of the confined mass of water-swellable clay, the confining layer will dissolve sufficiently, burst or tear to permit relatively free movement of the hydrating and expanding water-swellable clay.