Company Filing History:
5 out of 12 
3 out of 83 
1 out of 5 Years Active: 1983-2004
Title: Innovations of John V O'Brien
Introduction
John V O'Brien is a notable inventor based in Shrewsbury, MA (US), recognized for his contributions to the field of cryogenic processes and natural gas production. With a total of 10 patents, O'Brien has made significant advancements that enhance the efficiency and safety of gas separation technologies.
Latest Patents
One of his latest patents involves a method for separating nitrogen from methane in the production of liquefied natural gas (LNG). This innovative process ensures that substantially all nitrogen is removed from natural gas without creating mixed nitrogen/methane streams that require recycling and further processing. By operating both high-pressure and low-pressure multistage distillation towers in a two-column cryogenic nitrogen rejection unit, O'Brien's method produces acceptable liquefied natural gas as tower bottom products. Additionally, the low-pressure tower generates a gas stream containing no more than about 1% methane, allowing for safe venting to the atmosphere.
Another significant patent is the dephlegmator process with a liquid additive. This cryogenic process separates a lighter gas component from a heavier gas component in a gas feed stream. By injecting a liquid hydrocarbon additive stream into the upper portion of a dephlegmator-heat exchanger, O'Brien's method increases the rectification temperature or maintains the temperature while reducing the additive flow rate compared to conventional single-stage condensers.
Career Highlights
Throughout his career, John V O'Brien has worked with prominent companies such as Koch Process Systems, Inc. and Chart Inc. His expertise in cryogenic processes has positioned him as a valuable asset in the industry, contributing to advancements in natural gas production and separation technologies.
Collaborations
O'Brien has collaborated with notable professionals in his field, including James M Ryan and Arthur S Holmes. These partnerships have fostered innovation and the development of cutting-edge technologies in gas separation.
Conclusion
John V O'Brien's contributions to the field of cryogenic processes and natural gas production have established him as a leading inventor. His innovative patents and collaborations reflect his commitment to advancing technology in this critical area.