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:
Jul. 13, 1993
Filed:
Nov. 17, 1989
Applicant:
Inventors:
Philip M Lemoine, Seattle, WA (US);
Charles W Newquist, Issaquah, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22C / ; B22C / ;
U.S. Cl.
CPC ...
164132 ; 164369 ; 164529 ; 106 389 ;
Abstract
Expendable mandrels and methods of using such mandrels for forming voids within materials or surfaces on materials deposited onto the mandrels are described. The mandrels have a coefficient of thermal expansion that substantially matches that of the material to be deposited on the mandrel. Matching coefficients of thermal expansion reduces the likelihood of cracking of the base material when the mandrel and base material are cooled.