1932 advertisement for
Listerine
mouthwash
from
Lambert Pharmaceutical Co.
.
From 1921 until the mid-1970s, Listerine was also marketed as preventive and remedy for
colds
and
sore throats
. In 1976, the
Federal Trade Commission
ruled that these claims were misleading, and that Listerine had "no efficacy" at either preventing or alleviating the symptoms of sore throats and colds. Warner-Lambert was ordered to stop making the claims, and to include in the next $10.2 million dollars' of Listerine ads specific mention that "contrary to prior advertising, Listerine will not help prevent colds or sore throats or lessen their severity."
[1]
This work is in the
public domain
in the United States because it was
published
in the United States between 1929 and 1977, inclusive,
without a
copyright notice
. For further explanation, see
Commons:Hirtle chart
as well as a
detailed definition
of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the
rule of the shorter term
for US works (depending on the date of the author's death), such as Canada (50
p.m.a.
), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.