Susan Rosenblatt, who with her husband and law partner, Stanley Rosenblatt, took on Big Tobacco in a Florida case that seemed an absurd mismatch for their small firm. Yet the result was a $144.8 billion jury award in favor of people sickened by cigarettes. She died on Nov. 14 in Houston, at age 70.

In the headline-making tobacco case and in other prominent lawsuits, Stanley Rosenblatt did much of the in-court presenting and after-court news conferencing. But it was Ms. Rosenblatt’s legal scholarship — the research she did, the briefs she wrote — that provided the ammunition that made their successes possible, The New York Times said.