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:
Apr. 24, 1979
Filed:
Oct. 03, 1977
Applicant:
Inventors:
Ennio Cozzi, Cantalupo, IT;
Massimo Tardani, Busto Arsizio, IT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521138 ; 260 16 ; 2608 / ; 2608 / ; 2608 / ; 260861 ; 260862 ; 521183 ;
Abstract
Unsaturated polyester resins having an acidity number of 5-90 mg. KOH/g. a molecular weight of 500-5000 and which are capable of entrapping air or other inert gases so as to form structural foams and which contain in the chain 0.1 to 20 mol% of amide to the minimum acceptable link section size. Acceptable chain links are therefore excluded from fitting into the opening whereas worn chain links which have been worn to a degree which equals or exceeds the limit of permissible wear slide into the opening thereby indicating that the chain should be removed from service.