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:
Sep. 23, 1997
Filed:
Jun. 29, 1995
Applicant:
Inventors:
Robert A Roush, Norwich, CT (US);
Robert J DeAngelis, Niantic, CT (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B32B / ;
U.S. Cl.
CPC ...
428 99 ; 264102 ; 2643281 ; 2643288 ; 26432813 ; 367173 ; 367174 ; 428 68 ; 428 69 ; 428 76 ; 4284231 ;
Abstract
A method for making polyurethane acoustic windows. A molding material is lied to a reservoir connected to the bottom of the mold to fill the mold under the influence of a vacuum applied at the top of the mold. After initialling filling the mold, a second reservoir connects to the vacuum port and additional material is added to the first reservoir to partially fill the second reservoir. Thereafter the mold with the reservoirs attached is located in a pressure oven for curing. After curing the mold an acoustic window is removed from the mold for post molding operations.