Tryptophan overproducer mutants of cereal crops
Patent 4581847 Issued on April 15, 1986. Estimated Expiration Date: 
September 4, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 4, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesHerbicide-tolerant plants Patent #: 4443971 InventorsAssigneeApplicationNo. 06/647008 filed on 09/04/1984US Classes:800/268, Method of breeding involving a tissue culture step435/424, Involving corn cell or tissue800/275, Method of breeding maize800/276, METHOD OF CHEMICALLY, RADIOLOGICALLY, OR SPONTANEOUSLY MUTATING A PLANT OR PLANT PART WITHOUT INSERTING FOREIGN GENETIC MATERIAL THEREIN800/320.1MaizeExaminersPrimary: Bagwill, Robert E.Attorney, Agent or FirmInternational ClassesA01H 5/10 (20060101)C12N 9/88 (20060101) C12N 15/82 (20060101) C12N 15/01 (20060101) C12N 5/04 (20060101) AbstractThis invention is directed to the production of novel plant genotypes or lines which produce increased free tryptophan levels and are resistant to inhibition by analogs which normally inhibit the activity of the enzyme anthranilate synthase before alteration. This invention further relates to genes encoding such enzymes, and to processes for utilizing these novel genes and enzymes. Further products of the invention include plants, plant tissues and seeds which exhibit resistance to such analogs and overproduce tryptophan resulting from expression of genes encoding analog resistant anthranilate synthase enzyme.Other References
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