Patent Assignment
Reel/Frame 006409/0176
Assignment of Assignors Interest.
Recorded: 1993-01-27
Pages: 2
Assignor
SCHWARTZ, JO ANN THERESA
Executed: 1993-01-21
Assignee
E. I. DU PONT DE NEMOURS AND COMPANY
LEGAL-PATENTS, 1007 MARKET STREET, WILMINGTON, DELAWARE, 19898
Covered Property
(1)
Silica Microspheres, Method of Improving Attrition Resistance and Use
Patent:
5,352,645 →
Application:
07/980,319 →
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.