Henry G. Petrow — 7 Patents at Prototech

Henry G. Petrow has been granted 7 US patents while listed as an inventor at Prototech. The first was granted in 1981 and the most recent in January 1990. Henry G. Petrow ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Henry G. Petrow in Watertown, MA, US.

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Showing 1–7 of 7 patents

Patent #	Title	Co-Inventors	Date
RE33149	Finely particulated colloidal platinum compound and sol for producing the same and method of preparation of fuel cell electrodes and the like employing the same	Robert J. Allen	1990-01-16
4841997	Method for setting hair or fur	—	1989-06-27
4659566	Compositions and methods for permanently waving or straightening hair	—	1987-04-21
4581229	Method of removing metal ions and compounds from the hair	—	1986-04-08
4399185	Low pressure-drop catalytic mat and method of preparing the same	—	1983-08-16
RE31214	Colloidal sol antimony pentaoxide flameproofing compositions	Robert J. Allen	1983-04-19
4295985	Method of removal of chlorine retained by human skin and hair after exposure to chlorinated water, and soap and shampoo compositions adapted to effect said removal	Mark Weissman	1981-10-20

Henry G. Petrow — 7 Patents

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