Yes, it's the same company that makes the carburetors, and yes, there's a porous ceramic filter element. IIRC, the filter element is supposed to be held up against the metal housing by a spring to the bottom of the glass bowl. Most people just clean the ceramic filter with a blast of air in the reverse flow direction. The company's slogan used to be "The ABC's of carburetion- - - -Always Buy Carter!"
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!