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:
Oct. 12, 1993
Filed:
Apr. 02, 1992
George H Beall, Big Flats, NY (US);
Beth C Monahan, Painted Post, NY (US);
Candace J Quinn, Corning, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
This invention is directed towards the production of a bioabsorbable glass-polymer alloy comprising a bioabsorbable glass and a bioabsorbable polymer, said glass having a working temperature below about 350.degree. C., a transition temperature no higher than about 250.degree. C., and which exhibits a dissolution weight loss rate which is similar to the rate at which a bioabsorbable polymer is absorbed by the body. Such exemplary bioabsorbable polymers include poly(lactic) acid, poly(glycolic) acid, poly(dioxanone), polyethylene terephthalate, polyethylene oxide poly(caprolactone), copolymers of lactic acid and glycolic acid, and mixtures thereof. The glass disclosed herein consists essentially, expressed in terms of weight percent on the oxide basis, of at least 85% total of 30-55% P.sub.2 O.sub.5, 12-35% ZnO, 10-30% Cl, and 15-40% R.sub.2 O, wherein R.sub.2 O consists of at least one alkali metal oxide in the indicated proportions selected from the group consisting 5-25% Na.sub.2 O, 0-25% K.sub.2 O, and 0-7% Li.sub.2 O, and up to 15% total optional ingredients in the indicated proportions selected from the group consisting of 0-10% CaO, 0-10% MgO, 0-10% MnO, 0-10% B.sub.2 O.sub.3, 0-5% Al.sub.2 O.sub.3, 0-10% Fe.sub.2 O.sub.3 and 0-5% F.