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. 11, 1979
Filed:
Jun. 19, 1978
Richard B Tucker, Baltimore, MD (US);
Roland N Fracalossi, Baltimore, MD (US);
Mark T Wajer, Baltimore, MD (US);
Wm. T. Burnett & Co., Inc., Baltimore, MD (US);
Abstract
Flexible polyurethane foams having low resistance to air flow and, in addition, having good load bearing characteristics and high strength comprising the reaction product of polyisocyanate, a polyol blend including about 40-60 percent by weight of a polyether triol having an average molecular weight of about 4500-6500 and about 60-40 percent by weight of a reinforced polymer polyol having an average molecular weight of about 4500-5500 for the base polyol, and a low molecular weight cross-linking agent, such as 1,4-cyclohexanedimethanol or 4,4' methylene-bis (2-chloroaniline). Preferably the air flow characteristics are improved by crushing the reaction product before it is fully cured.