Clifford is a big red dog who belongs to Emily and causes mischief but is ultimately a good dog.
While Clifford the Big Red Dog was registered for copyright in 1963 upon its publication it was not renewed in 1991 therefore the first book and only the first book is public domain.
The Pink Panther as many likely know is a creation from the 1963 film The Pink Panther which is primarily about a jewel with that name. The Pink Panther was created for promotional material, the trailer and the opening.
He first appeared in the trailer for the film, pictured above which did not have a copyright notice making it public domain. The film itself obviously isn’t but it creates the situation of the Pink Panther, the cartoon panther being public domain.
Pink Panther is a registered trademark so keep that in mind and any later appearances obviously aren’t public domain.
Fin Fang Foom is an ancient dragon being that can shapeshift that is awakened to attack the Communist Party thanks to some herbs by Chan Liuchow when his homeland of Taiwan is under threat.
Strange Tales #89 was not renewed 28 years after publication as was standard at the time so copyright would’ve expired in 1989.
They specifically did not renew issues 85 to 99 so those are all public domain now.
