U.S. patent; chitin as an extender and filter for tobacco
By: Paul R. Austin.
Series: DEL-SG -- 25-76.
Publisher: College of Marine Studies, University of Delaware
Published: 1976
Place of publication: Newark
Language: eng
Subjects: Chitin.
Other titles: Chitin as an extender and filter for tobacco.
Notes: Grant 04-3-158-30.

Copy of United States patent application.