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:
Sep. 08, 1987
Filed:
Aug. 01, 1986
Applicant:
Inventors:
Bruce R Johnson, Sebastopol, CA (US);
Ralph A Falconer, Novato, CA (US);
Assignee:
Jandy Industries, Inc., Novato, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
137268 ; 422264 ; 422282 ;
Abstract
There is disclosed a device for dispensing a chemical wherein a stack of dry chemical tablets are contained within a receptacle. Sealing means are provided to seal around each tablet and the inner wall of the canister so that only the upper surface of the top tablet is exposed to the circulating water. The tablets are not exposed to the flowing water until the tablets above have been eroded away successively to provide leak paths around them.