Company Filing History:
5 out of 736 
4 out of 19 
1 out of 1 Years Active: 1998-2000
Title: Innovations of Eric D Marquardt
Introduction
Eric D Marquardt is a notable inventor based in Lakewood, Colorado. He holds five patents that showcase his contributions to the field of refrigeration and cryogenic technology. His work reflects a commitment to advancing innovative solutions in these areas.
Latest Patents
One of his latest patents is the Miniature Mixed Gas Refrigeration System. This system features a coaxial catheter with an inner high-pressure supply lumen and an outer low-pressure return lumen. The gas mixture is pressurized by a compressor to a pressure less than 420 psia for safety reasons. The distal portion of the outer lumen contains a micro-miniature heat exchanger constructed of laminated plates or sheets. These plates establish high-pressure and low-pressure passageways, maximizing heat exchange through a tortuous path for gas flow. The high-pressure outlet of the heat exchanger connects to a Joule-Thomson expansion element, allowing the gas to expand isenthalpically to a lower temperature, reaching as low as 180K. This low-temperature gas cools a heat transfer element mounted in the outer wall of the catheter, effectively cooling an external object. The return gas flows back through the heat exchanger to pre-cool the incoming high-pressure gas mixture.
Another significant patent is the Flexible Catheter Cryosurgical System. This invention includes a microminiature laminated heat exchanger designed for use in a cryogenic probe. The heat exchanger features high and low-pressure flow patterns etched into oxygen-free copper sheets, promoting turbulent flow. The sheets are bonded into a laminated assembly shaped like a cylinder, with designated high-pressure and low-pressure inlets and outlets. The flow paths are arranged to accomplish counterflow heat exchange, enhancing the efficiency of the system.
Career Highlights
Throughout his career, Eric has worked with various organizations, including the Government of the United States of America, as represented by the Secretary of Commerce, and Cryogen, Inc. His experience in these roles has contributed to his expertise in the field of cryogenics and refrigeration.
Collaborations
Eric has collaborated with notable individuals such as Ray Radebaugh and John Daniel Dobak, III. These partnerships have likely enriched his work and led to further advancements in his inventions.
Conclusion
Eric D Marquardt's innovative contributions to refrigeration and cryogenic technology are evident through his patents and career achievements. His work