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About Constance

Constance Rhebergen serves as chair of the firm’s technology section. She is known for quickly determining what clients need, and more importantly, what it takes to achieve these goals. Her multi-national clients benefit from her experience as an engineering consultant. In addition to her responsibilities, she has served as a member of the firm’s management committee.

As a registered patent attorney, Ms. Rhebergen is extremely well placed to counsel and represent business clients in the identification, protection, licensing and transfer of intellectual property assets and in providing patent infringement and validity opinions. She brings to bear a comprehensive range of skills to advise businesses and government agencies in the United States, Latin America, Europe, MENA region and beyond with a proficiency on all matters concerning intellectual property, portfolio management and international intellectual property law disputes.

Ms. Rhebergen has a rich blend of skills honed over years of practice. As a result, she is highly proficient across a range of technologies, including energy, chemical and process applications, mechanical arts, and computer software. Industries served include oil and gas, hydrocarbon, processing, chemical processing, petrochemicals, agriculture and food, computer software, oil well drilling, synfuel, sports, education, telephone, wastewater, mechanical equipment, instrumentation and explosives.


Recent Notable Matters

National oil companies — patent prosecution, trademark matters, licensing, joint development and commercialization negotiations

Large fuel and lubricant technology company — patent prosecution, worldwide intellectual property asset management and trade secret litigation

Petrologistics — negotiation of license and engineering and technical services agreement for C3 Catofin - Dehyrogenation Unit for production of polypropylene, as well as development of intellectual property strategy surrounding auxiliary developments

Kinder Morgan, Inc. — contract negotiations for condensate processing service agreements and engineering procurement agreements relative to development of multiple units of new condensate plant as well as further expansions

Westinghouse — negotiation of intellectual property provisions and licenses in engineering, procurement and construction agreement and consortium arrangements for new nuclear power plants in the United States, Canada and Poland

ITS — multimillion dollar software negotiation with one of the world's major software companies

Trademark owners — domain name disputes before ICANN

Software developer — Internet domain name disputes and copyright issues related to Digital Millennia Act, warez sites and translations

International Internet recruitment service provider — intellectual property issues including privacy issues, data protection and safe harbor provisions

School districts and colleges — copyright issues, Internet privacy and terms of use, distance learning and rights of publicity

Merchant energy company — intellectual property component of securing $6.2 billion in credit facilities

Progress Materials — patent prosecution and multi-million dollar patent litigation

Fortune 500 U.S. energy company with international assets — sale of assets, including evaluation and due diligence of all intellectual property assets

Public entity — $20 million software license and service agreement negotiation and due diligence

Engineering company — patent prosecution and multinational trademark protection

City of Madrid — intellectual property licensing negotiation for a theme park with a major entertainment corporation

Publications and Speeches

“Keep Quiet and Carry On Under the EU Trade Secrets Directive,” IP Magazine, September 2016.

“Dangerous Waters in the Safe Harbour,” IP Magazine, February 2016.

"Lame-Duck Patent Reform Goes Almost Entirely Unnoticed," Law360, December 2012.



University of Houston Law Center,
University of Houston,
Northwestern University,
B.S., Chemical Engineering

Bar Admissions

U.S. Patent and Trademark Office




Certified Licensing Professional


State Bar of Texas
Houston Intellectual Property Law Association
Texas Women Lawyers
International Trademark Association
Texas Bar Foundation



Patent Security Interest in China

May 25, 2017
Your IP Insider

Clean-energy Patent Suits on the Rise

March 13, 2016
EnergyBiz Online

Clean-energy patent suits on the rise

August 27, 2015
EnergyBiz Online



Newton Media Ltd
World IP Review
WIPR Leaders, 2017
Chambers USA
Texas Intellectual Property, 2014 - 2017, 2006 - 2012
The Legal 500 United States
Intellectual Property (IP): Patent Prosecution: Utility and Design Patents, 2011 - 2015
Globe Business Publishing Ltd.
IAM Patent 1000
2012 - 2017
Globe Business Publishing Ltd.
Client Choice
Euromoney Institutional Investor PLC
Managing Intellectual Property
IP Star (Texas), 2014 - 2017; IP Star (United States), 2014; IP Stars: Top 250 Women in IP, 2013 - 2014
Thomson Reuters
PLC Which Lawyer?
2010 - 2012
American City Business Journals
Houston Business Journal
Top IP Litigators in Houston, 2011
Thomson Reuters
Super Lawyers
Corporate Counsel Edition, 2008
Thomson Reuters
Texas Super Lawyers
2006 - 2007