Chemical tablet with central hole and partially exposed top and

Details Chemical tablet with central hole and partially exposed top and Chemical tablet with central hole and partially exposed top and

1991-12-02

1992-08-11

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Tablets, lozenges, or pills

424 768, 424405, A61K 920

Patent

active

051377314

ABSTRACT:
A toroidal chemical tablet with a close fitting water impervious peripheral barrier surrounding its sides with exposed upper and lower annular surfaces is disclosed. The tablet has a central hole to aid in water flow and dissolves inside out for even feeding. Also disclosed is a pool chemical tablet partially encased in a covering which when placed in a pool skimmer gives a visual indication when the tablet is substantially dissolved, as well as methods for using the tablet.

REFERENCES:
patent: 2711346 (1955-07-01), Irwin et al.
patent: 3856932 (1974-12-01), May
patent: 4333752 (1982-06-01), Thies et al.
patent: 4350666 (1982-09-01), Klutts
patent: 4374563 (1983-02-01), Alexander
patent: 4546503 (1985-10-01), Casberg
patent: 4643881 (1987-02-01), Alexander et al.
patent: 4704118 (1987-11-01), Eckenhoff
patent: 4876003 (1989-10-01), Casberg
Design Application U.S. Ser. No. 07/503,590 filed Mar. 27, 1990, by J. M. Casberg.

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