Nutech Ventures v. Syngenta Seeds, Inc.

984 F. Supp. 2d 957, 2013 WL 6154374, 2013 U.S. Dist. LEXIS 166363
CourtDistrict Court, D. Nebraska
DecidedNovember 22, 2013
DocketCase No. 8:12CV289
StatusPublished

This text of 984 F. Supp. 2d 957 (Nutech Ventures v. Syngenta Seeds, Inc.) is published on Counsel Stack Legal Research, covering District Court, D. Nebraska primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Nutech Ventures v. Syngenta Seeds, Inc., 984 F. Supp. 2d 957, 2013 WL 6154374, 2013 U.S. Dist. LEXIS 166363 (D. Neb. 2013).

Opinion

MEMORANDUM AND ORDER

LAURIE SMITH CAMP, Chief Judge.

This matter is before the Court on the parties’ Joint Claim Construction State[961]*961ment (Filing No. 75). Plaintiff and Counterclaim Defendant NuTech Ventures (“NUTeeh”) has sued Defendants and Counterclaim Plaintiffs Syngenta Seeds, Inc. (“Syngenta”) and Trenton Agri Products LLC (“Trenton”) (collectively “Defendants”) alleging that the Defendants have infringed U.S. Patent No. 6,506,592 B1 (the “'592 Patent”). The parties collectively have requested that the Court construe certain terms in the '592 Patent.

BACKGROUND

I. General Patent Overview

The '592 Patent is titled “Hyperthermophilic Alpha-Glucosidase Gene and Its Use,” and generally relates to plant matter that has been genetically transformed so that it produces an enzyme not naturally produced in the plant. (Filing No. 1-1, summary; Filing No. 85 at 2.) The patent application was filed on August 18, 1999, and claims priority to a provisional application that was filed a year earlier. The '592 Patent issued on January 14, 2003, and includes nine claims directed to a “method of converting plant substrate.” Dr. Paul Blum (“Dr. Blum”), a professor and researcher at the University of Nebraska in Lincoln, Nebraska, developed the technology used in the '592 Patent, and NUTeeh owns the '592 Patent. NUTeeh claims that the Defendants’ use of a bio-engineered corn called Enogen relies on technology from the '592 Patent to convert the starch in corn into smaller sugars during ethanol production.

II. General Scientific Overview

The '592 Patent relates to reactions that occur during a chemical process called hydrolysis. Carbohydrates can be considered a group of sugar molecules joined by chemical bonds. Carbohydrates, such as starch, store energy. When the chemical bonds in a group of sugar molecules are broken, the starch can be processed for use in different industries, such as the production of ethanol. The chemical bonds between sugar molecules in starch are called “glycosidic bonds.” To convert starch into sugars, the chemical bonds between the sugar molecules are broken by water through hydrolysis.

The natural hydrolysis reaction can be very slow, so ethanol producers add proteins to the process called “enzymes” to act as catalysts to speed up the reactions. Enzymes are proteins that function as catalysts in biochemical reactions by acting on one or more starting plant materials called “substrates.” Environmental conditions, such as temperature and pH, can greatly affect the activity of an enzyme. In general, the activity of an enzyme increases with temperature because molecules move and interact more quickly at higher temperatures. Temperature also affects the integrity and stability of enzymes. Increased temperature can cause the protein structure of an enzyme to weaken, which can hinder its ability to catalyze reactions. Depending on their structure and other characteristics, some enzymes are only active at moderate temperatures, whereas other related enzymes catalyzing the same reactions are capable of activity at relatively high temperatures. The thermophilicity of an enzyme relates to the ability of the enzyme to catalyze reactions at relatively high temperatures.

While active enzymes can convert plant material to products such as ethanol, continued activity at times may not be desirable. For this reason, cells of living organisms have evolved to regulate enzyme activity. For example, cells can regulate when and where an enzyme is produced. Those skilled in the art can take advantage of natural regulatory mechanisms in living cells to design recombinant enzymes to catalyze desired activity. For example, [962]*962those skilled in the art can engineer the cellular location and activity of enzymes to control when certain processes occur.

III. Invention Background

The claims in the '592 Patent involves a specific type of enzymes called “glycosyl hydrolases” that aid in breaking glycosidic bonds during hydrolysis. NUTech claims that, prior to the invention, companies typically added enzymes at some point during the hydrolysis process to speed up production. This is because industrial hydrolysis involved not only adding water and enzymes to a mixture of plant material, but also heating the mixture to a very high temperature. Thus, the enzymes had to be heat resistant to perform their function at high temperatures. Enzymes that can resist heat and perform their function at high temperatures are called “thermostable” enzymes. Purchasing and storing thermostable enzyme additives is expensive and represents a significant cost in the starch hydrolysis process.

In the '592 Patent, Dr. Blum claims to have identified and cloned a glycosyl hydrolase derived from an organism that grows in locations that experience high temperatures. Dr. Blum also developed a bioengineered plant containing glycosyl hydrolases from these organisms. Because the organisms could survive in high temperatures, the glycosyl hydrolases derived from the organisms were thermostable, and could survive at high temperatures. Further, the enzymes were already located in the bioengineered plants, so companies would not have to purchase, store, and then add the enzyme additives to convert the starch in the plant material. Because of their hyperthermophilie origin, the enzymes would not significantly interfere with the plants’ normal metabolism, and were not toxic to the plants even when the enzymes were found inside the same cells as the plant substrate.

IY. Patent Prosecution History

Dr. Blum originally filed a provisional patent application in 1998, and a formal patent application in 1999. The United States Patent and Trademark Office (“USPTO”) spent over three years reviewing the application before a patent was issued in 2003. Both parties’ arguments reference the prosecution history to aid their respective claim constructions. By reviewing the prosecution history, the Court does not prejudge infringement or validity of the '592 Patent. However, this information is useful for background, and can be considered in interpreting terms.1

The parties agree that, generally in the 1990s, the method in the industry was to add separately produced enzymes to plant material for use in hydrolysis. The '592 Patent states that “[a] variety of industries, such as food and chemical, employ hydrolases for the production of glucose, sucrose and other sugars,” and that “[h]igh value is placed on thermostability and thermoactivity of enzymes for use in the [963]*963bioprocessing of starch.... ” (Filing No. 1-1 at 1:25-30.) The '592 Patent also notes that “the current method used in the industry” in the 1990s was “to add separately produced commodity enzymes to plant material.” (Id. at 3:1-2.)

The USPTO Examiner originally rejected Dr. Blum’s pending claims as obvious. The USPTO explained that the original application lacked reference to previously published papers on related subjects, and thus failed to disclose the prior art. Much of the prosecution history concerned a 1992 article entitled “Production of Active Bacillus Licheniformis Alpha-Amylase in Tobacco and Its Application in Starch Liquiefaction” written by Jan Pen and others (the “Pen Article”).2

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984 F. Supp. 2d 957, 2013 WL 6154374, 2013 U.S. Dist. LEXIS 166363, Counsel Stack Legal Research, https://law.counselstack.com/opinion/nutech-ventures-v-syngenta-seeds-inc-ned-2013.