In Memoriam: Leo E. Manzer (1947–2025)

Leo, age 78, passed away peace­ful­ly on the morn­ing of Aug 10th at home with his wife, two chil­dren, and beloved dog, Chloe, by his bed­side. Leo was born in 1947 in Tim­mins, Ontario Cana­da. He spent his ear­ly years mov­ing around in Ontario before his fam­i­ly set­tled in Nia­gara Falls. He grad­u­at­ed with an Hon­ors degree in Chem­istry from the Uni­ver­si­ty of Water­loo and obtained his PhD in chem­istry from the Uni­ver­si­ty of West­ern Ontario in 1973.

Upon grad­u­a­tion he was hired by DuPont and joined their Cen­tral Research Depart­ment at the Exper­i­men­tal Sta­tion in Wilm­ing­ton DE where he began a 32-year career. Leo man­aged groups doing catal­y­sis and process research and devel­op­ment, retir­ing at the age of 58 as a DuPont Fel­low. After retire­ment Leo found­ed Cat­alyt­ic Insights and worked with over 50 start­up com­pa­nies devel­op­ing tech­nolo­gies for the con­ver­sion of bio­mass to bio­fu­els and bio­chem­i­cals. Dur­ing his con­sult­ing and DuPont careers he was the proud inven­tor of 167 US patents and over 500 for­eign patents.

Leo loved the out­doors and after retire­ment enjoyed his home in Lewes DE where he spent much of his sum­mer­time surf fish­ing and kayak fish­ing at Cape Hen­lopen State Park. It was there that he taught his chil­dren and grand­chil­dren to fish and kayak. He also enjoyed fish­ing and camp­ing with his broth­er in North­ern Ontario for bass, and mul­ti­ple trips to Kodi­ak, Alas­ka, to catch salmon and halibut.

Leo is sur­vived by his wife of 55 years, Mar­garet, chil­dren Joan and Chad, 4 grand­chil­dren and his broth­er Al.

A vis­i­ta­tion will be held on Mon­day, August 18, from 10 am to 11:15 am at St. Mag­dalen Church, 7 Sharp­ley Rd, Wilm­ing­ton, DE where a eulo­gy will fol­low at 11:20 am. A Mass of Chris­t­ian Bur­ial will be cel­e­brat­ed at 11:30 am.

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