Appeal No. 1995-4903
Application No. 07/926,016
of the specific materials. See Brief, page 5. We disagree.
Haefele(‘002) discloses an oral composition for plaque
containing both a bisguanamide and an anticalculus agent. See
column 1, lines 39-43. We find that the bisguanamides are
exemplified by chlorhexidine or salts thereof. We further find
that chlorhexidine and its salts are the bisguanamides of
choice. See Examples V through XXIII.
Numerous phosphonic acids including many patents drawn to
phosphonic acid containing anticalculus agents are disclosed
by Haefele(‘002) beginning at column 4, line 28 through column
7, line 4. Based upon this extensive disclosure, we conclude
that any phosphonic acid anticalculus agent may be used with
Haefele’s(‘002) preferred chlorhexidine. However, the
specific azacycloalkane-2,-diphosphonate of the claimed
subject matter is not taught.
Ploger(‘772) discloses the diphosphonic acids of the
claimed subject matter, and teaches that the compounds are
useful in toothpastes and mouthwashes where they prevent
formation of tartar and plaque. Hence, we conclude that they
are by definition anticalculus agents. See Abstract and
column 3, lines 38-43. Based upon the above considerations,
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