She maintained her private practice until the age of 81.

He maintained an office in the hospital until his death.

He maintained the position until the end of the 1937 season.

He continued to maintain a personal interest in the business until his death.

They maintained it for family and friends until the 1970's, he said.

These traditional activities have been maintained until the present day.

The party was able to maintain its unity until 1979.

They maintained their relationship off and on for 30 years until his death in January 1961.

As a result, the civilization was able to maintain itself until the 19th century.

Perhaps they could be of some police value if the secret was maintained until that time.