In Re Thomas F. Deuel, Yue-Sheng Li, Ned R. Siegel and Peter G. Milner Case Brief
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Case Brief Summary & Legal Analysis
tl;dr: The court reversed the PTO’s obviousness rejection of claims for specific DNA sequences, holding that knowledge of a partial protein sequence and general cloning methods does not render the specific DNA encoding that protein obvious due to genetic code redundancy.
Legal Significance: Established that a specific DNA sequence is not obvious merely because the encoded protein (or part of it) and general cloning methods are known, absent prior art suggesting the particular DNA structure.
In Re Thomas F. Deuel, Yue-Sheng Li, Ned R. Siegel and Peter G. Milner Law School Study Guide
Use this case brief structure for your own legal analysis. Focus on the IRAC methodology to excel in law school exams and cold calls.
Case Facts & Court Holding
Key Facts & Case Background
Deuel claimed isolated and purified DNA and cDNA molecules encoding heparin-binding growth factors (HBGFs). Claims 5 and 7 were for specific cDNA sequences for human and bovine HBGFs, respectively, while Claims 4 and 6 generically covered all DNA sequences encoding these proteins. The U.S. Patent and Trademark Office (PTO) rejected these claims as obvious under 35 U.S.C. § 103. The rejection combined prior art: Bohlen, which disclosed a partial N-terminal amino acid sequence of similar proteins (HBBMs), and Maniatis, which described a general method for gene cloning. The examiner and the Board of Patent Appeals and Interferences reasoned that Bohlen’s disclosure of the protein sequence would motivate one skilled in the art to isolate the corresponding gene using Maniatis’s general cloning methods, thereby rendering the claimed DNA/cDNA molecules obvious. Deuel had isolated the specific cDNAs after determining a partial amino acid sequence of the target protein and subsequently screening cDNA libraries.
Court Holding & Legal Precedent
Issue: Did the prior art disclosure of a partial protein amino acid sequence and a general method for gene cloning render specific cDNA molecules encoding that protein obvious under 35 U.S.C. § 103?
No. The court reversed the Board’s decision, holding that the claimed specific Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit ame
IRAC Legal Analysis
About IRAC analysis
IRAC (Issue, Rule, Analysis, Conclusion) is the structure professors expect in exam answers. Each LSD.Law brief states the issue, the governing rule with citations, the court's application of that rule, and the conclusion - the same reasoning pattern you will use on exams and in practice.
Legal Issue
Did the prior art disclosure of a partial protein amino acid sequence and a general method for gene cloning render specific cDNA molecules encoding that protein obvious under 35 U.S.C. § 103?
Conclusion
This case significantly clarified that knowledge of a protein's amino acid sequence Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excep
Legal Rule
For a chemical compound to be prima facie obvious, the prior art Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occ
Legal Analysis
The court reasoned that a prima facie case of obviousness for new Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo c
Flash-to-Full Case Opinions
Flash Summary
- Knowledge of a protein’s partial amino acid sequence and a general