Claim: A Street Cat Named Sylvester, directed by I. Freleng (an American animator and cartoonist known for his work at Warner Bros. Cartoons) and story by Warren Foster, was released on September 5, 1953 in US with a running time of six minutes.
Evidence: I. Freleng Isadore "Friz" Freleng (August 21, 1906 – May 26, 1995), often credited as I. Freleng, was an American animator, cartoonist, director, producer, and composer known for his work at Warner Bros. Cartoons on the Looney Tunes and Merrie Melodies series of cartoons. Warren Foster The short was released on September 5, 1953, and stars Tweety and Sylvester. 6 minutes