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. 13, 2021
Filed:
Jul. 20, 2017
John I. Nanos, Ann Arbor, MI (US);
John I. Nanos, Ann Arbor, MI (US);
BioNanoFoam LLC, Ann Arbor, MI (US);
Abstract
A bio-based polyurethane foam manufactured by a process that involves cleaning a bio-based polyoxyalkylene glycol polyol by a method comprising the steps of adding an adsorbent to the bio-based polyoxyalkylene glycol polyol to create a mixture in the ratio of 0.5% to 5.0% adsorbent to bio-based polyoxyalkylene glycol polyol by weight, stirring the mixture in a gaseous nitrogen environment, replacing the gaseous nitrogen environment with a gaseous carbon dioxide environment, and filtering the mixture to separate impurities from the mixture and create a cleaned bio-based polyoxyalkylene glycol polyol; then mixing the cleaned bio-based polyoxyalkylene glycol polyol with a polyfunctional isocyanate to create a bio-based polyurethane prepolymer; and then foaming the bio-based polyurethane prepolymer by admixing with an excess of water to make the bio-based polyurethane foam.