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. 07, 1977
Filed:
Jul. 25, 1975
Alois Crepinsek, El Paso, TX (US);
International Top Security Corporation, El Paso, TX (US);
Abstract
A chain lock for doors is greatly reinforced by the placement of a first chain end anchor behind an angle retainer which embraces a square corner of the adjacent door frame and is further secured by a serrated clamping plate in a plane perpendicular to the first chain end anchor. The opposite chain end anchor is received in a slot of a retainer plate which similarly embraces a corner of the swinging door and is further held securely by an extension which is locked to an adjacent interior portion of a door lock cylinder housing assembly.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile