Fred Apffel — 12 Patents at Flexivol

Fred Apffel has been granted 12 US patents while listed as an inventor at Flexivol. The first was granted in 1981 and the most recent in October 1991. Fred Apffel ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Fred Apffel in Houston, TX, US.

Patents per Year

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Showing 1–12 of 12 patents

Patent #	Title	Co-Inventors	Date
5057189	Recovery apparatus	—	1991-10-15
4861360	Carbon dioxide absorption methanol process	—	1989-08-29
4839151	Recovery process	—	1989-06-13
4767428	Nitrogen removal system	—	1988-08-30
4738699	Process for recovering ethane, propane and heavier hydrocarbons from a natural gas stream	—	1988-04-19
4675035	Carbon dioxide absorption methanol process	—	1987-06-23
4647443	Recovery process	—	1987-03-03
4597788	Process for recovering ethane, propane and heavier hydrocarbons from a natural gas stream	—	1986-07-01
4584006	Process for recovering propane and heavier hydrocarbons from a natural gas stream	—	1986-04-22
4456460	Process for recovering ethane, propane and heavier hydrocarbons from a natural gas stream	—	1984-06-26
4284616	Process for recovering carbon black and hydrocarbons from used tires	Age Solbakken, Sam P. Robinson, Bobby L. Hayes	1981-08-18
4250158	Process for recovering carbon black and hydrocarbons from used tires	Age Solbakken, Sam P. Robinson, Bobby L. Hayes	1981-02-10

Fred Apffel — 12 Patents

Patents per Year

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