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:
Dec. 22, 1998
Filed:
Jun. 05, 1995
Applicant:
Inventor:
Alvin Guttag, Gaithersburg, MD (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; B32B / ;
U.S. Cl.
CPC ...
428 357 ; 428 366 ; 428483 ; 428517 ; 428518 ; 428523 ; 206484 ; 2064842 ; 206807 ; 422 55 ;
Abstract
One aspect of the present invention reveals a multi-layered storage container that changes color in response to acid gases. The storage container is comprised of at least one layer of a plastic and at least one layer of a gas-barrier polymer. Furthermore, the multi-layered storage container is provided with a color-changing indicator to show the presence of acidic gases. The other aspect of the present invention reveals a diaper which, as the result of chemical and/or electrical processes, can indicate when the diaper is wet.