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:
Nov. 27, 2001
Filed:
Dec. 30, 1998
Applicant:
Inventor:
L. Harvey Barclay, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 3/348 ;
U.S. Cl.
CPC ...
G01N 3/348 ;
Abstract
The present disclosure is a tape responsive to gases. One version is paper impregnated with lead acetate, a backing layer of impervious sheet material, and a top face pervious, transparent layer. The top layer retards gas exposure and expands the range of sensitivity. The top layer is preferably pervious, transparent and has a thickness and width to control exposure.