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:
May. 26, 1987
Filed:
Nov. 25, 1980
Peter M Holleran, Orinda, CA (US);
W. R. Grace & Co., Cambridge, MA (US);
Abstract
Valves connected to dip tubes in conventional pressurized 'aerosol'-type containers for dispensing materials which react or cure upon dispensing (e.g. moisture-curable polyurethanes), are protected against premature failure by introducing a small amount of dry, inert gas into the dip-tube shortly after charging the container. The gas (e.g. nitrogen) acts as a barrier to prevent contact between the product in the container and the valve mechanism prior to use of the product. Preventing such contact avoids premature hardening of product in the valve mechanism caused by reaction of product with moisture.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile