Johann Hupfl

Johann Hupfl is recorded as inventor on 1 U.S. patent in the PatentGenius reference database, with patent activity dated 1977.

Recorded Patents

• US4063883 — Manufacture of flame-retardant regenerated cellulose fibres (Granted: 1977-12-20)

Filing Assignee

Chemiefaser Lenzing AG

Co-Inventors

• Manfred Czermak
• Helmut Teichmann
• Josef Paul
• Hoechst AG

External Reference

Filing records and full claims text are accessible via the U.S. Patent and Trademark Office: View patents by Johann Hupfl on Google Patents.