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:
Aug. 22, 1989
Filed:
Nov. 17, 1987
Applicant:
Inventor:
Victor B van Blerk, San Jose, CA (US);
Assignee:
Verbatim Corp., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360133 ;
Abstract
An environmental indicator assembly in a floppy disk cassette provides a warning signal when the cassette has been subjected to either a high-moisture or a high-temperature condition either environment being potentially harmful to the disk. The indicator assembly includes a wax which melts in a high-temperature environment and a hygroscopic salt which breaks down in a high-moisture condition. If either the wax or the salt changes from a solid form, a warning flag automatically moves into a position viewable to a cassette user.