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. 14, 1977
Filed:
Jul. 12, 1976
Andrew Green, Fort Worth, TX (US);
Composite Technology, Inc., Fort Worth, TX (US);
Abstract
A fiberglass ladder comprising a pair of rails and a plurality of rungs interposed at selected intervals. Each rung and each rail has a continuous layer of fiberglass filaments extending parallel to its respective length. At the intersection of the rails with the rungs, the filaments bend with a portion of the filaments in the rung extendingin one direction along the rail, and a portion of the filaments in the rung extending in the other direction along the rail. The ladder is cast in a mold in a solid integral piece. Woven fiberglass is placed in the channels of the mold over a coating of resin. The fiberglass filaments are placed over the fabric in the bottoms of the channels. The channels are then filled wth a rigid plastic foam and the ladder is allowed to cure.