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:
Feb. 06, 1975
Finn Hannover, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A core element preferably of plastic material is provided wherein one embodiment of the core element comprises (1) a tubular body member and (2) a tubular coupling member of water-degradable material disposed within one end of the tubular body member and extending axially outwardly therefrom, and (3) a tubular coupling member of water-degradable material disposed within the other end of the tubular body member and also extending axially outwardly therefrom, including also diametrically opposed lug members extending radially outwardly from the tubular coupling member that engage a slot disposed in the wall of the tubular body member whereby the tubular coupling member may be moved into and out from the tubular body member as in a telescoping manner.