in 1946, in an effort to continue the company's post-war recovery, the name of all the stores were changed to 7-eleven to adjust to the stores' new hours of operation, which were never known at the time. in 1969, 7-eleven tried to do a 24-hour plan in austin, texas, after an austin store stayed open all night to satisfy customer wants. later on, 24-hour stores were created in fort worth and dallas, texas, as well as las vegas, nevada. in 1971, southland acquired convenience stores of the former pak-a-sak chain owned by graham allen penniman, sr. (1903–1985), of shreveport, louisiana.