The Press remained periodically active throughout the 1980s and into the early 1990s.

Some of them remained active with it into the 1970s.

It remained fairly active, however, into the start of the 20th century.

She remained active on the stage up into the 1880s.

After retiring, he remained active in the field into the 1990s.

Clark remained active in television and movie production into the 1990s.

He remained active in state politics into the Reconstruction period.

After retiring, he remained active in the field into the 1990's.

He continued to be active as a musician into the 2000s.

It seems he was still active into the 90s, at least.