John P Marshall

John P Marshall is a notable inventor based in Lacey Green, GB. He has made significant contributions to the field of technology, holding a total of 3 patents. His work focuses on advancements in air separation and chemical compounds, showcasing his expertise and innovative spirit.

Latest Patents

One of Marshall's latest patents is titled "Separation of air: improved Heylandt cycle." This invention involves a compressed, purified air stream that is cooled through heat exchange with returning streams in a heat exchanger. The air stream is then passed through a Joule-Thomson valve, resulting in a mixture of liquid and vapor that is separated in a phase separator. The vapor stream is introduced into the higher pressure column of a double distillation column, where oxygen-rich liquid is withdrawn and processed further. This innovative method enhances the efficiency of oxygen production.

Another significant patent involves "5,6,7,8-tetrahydro-napthonitrile intermediates." This patent describes compounds of a specific formula and their acid addition salts, which have various applications in chemical synthesis.

Career Highlights

Throughout his career, John P Marshall has worked with prominent companies, including Beecham Group Plc. His experience in these organizations has contributed to his development as an inventor and has provided him with valuable insights into the industry.

Collaborations

Marshall has collaborated with notable individuals in his field, including Peter M Newsome and Noel A Mullan. These partnerships have likely fostered innovation and creativity in his projects.

Conclusion

John P Marshall's contributions to the field of invention are noteworthy, particularly in air separation technologies and chemical compounds. His patents reflect a commitment to innovation and efficiency, marking him as a significant figure in his industry.