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. 30, 1992
Filed:
Sep. 26, 1990
Farrokh Farzin-Nia, Inglewood, CA (US);
Terry L Sterrett, Long Beach, CA (US);
Other;
Abstract
A crystalline orthodontic bracket which has been subjected to a machining operation having improved fracture toughness and a heat treatment method for obtaining such improved fracture toughness. The method includes the steps of placing the machined orthodontic bracket in an oven and heating the bracket at an elevated temperature above normal annealing temperatures and slightly below the melting point of the brackets which is capable of healing surface microcracks. The bracket is maintained at this temperature for a predetermined period of time so as to heal microcracks on the surface. The bracket is then removed and allowed to cool to room temperature.