Historical clue formulations

• ___ mater (brain protector) — 2025-09-19
• ___ mater (brain membrane) — 2025-02-25
• ___ mater (brain cover) — 2021-12-26
• ___ mater (brain membrane) — 2019-01-22
• Long-lasting, in commercial names — 2017-04-29
• Long-lasting, in commercial names — 2004-08-06
• ___ mater (brain membrane) — 2003-08-27
• ___ mater — 2001-06-17
• ___ mater (brain cover) — 2001-05-08
• Brain membrane — 1997-11-05
• _____ mater — 1994-01-09