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Inventor

Howard P. Withers, Jr.

Inventor
Breinigsville, PA, US

Overview

32→
Patents
1984–2016
Patent span
Chemistry
Primary field (CPC C)

Patents· 32 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Cprimary
C07CAcyclic or carbocyclic compounds23%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests16%
C01BNon-metallic elements9%
B01DSeparation4%
C01CAmmonia3%
C01GCompounds containing metals not covered by subclasses c01d or c01f3%
C23CCoating metallic material3%
Y10TTechnical subjects covered by former us classification3%
B05DProcesses for applying fluent materials to surfaces, in general1%
PatentTitleYear
9,463,978'Process for making trisilylamine'20169,284,198'Process for making trisilylamine'20168,945,367'Electrolytic apparatus, system and method for the safe production of nitrogen trifluoride'20157,087,102'Process for purification of germane'20067,074,378'Process for the purification of NF3 '20066,790,428'Process for the reduction or elimination of NH3/HF byproduct in the manufacture of nitrogen trifluoride'20046,686,594'On-line UV-Visible light halogen gas analyzer for semiconductor processing effluent monitoring'20046,583,048'Organosilicon precursors for interlayer dielectric films with low dielectric constants'20036,514,471'Removing fluorine from semiconductor processing exhaust gas'20036,352,676'Abatement of F2 using small particle fluidized bed'20026,106,790'Abatement of NF.sub.3 using small particle fluidized bed'20005,959,170'Methane conversion process'19995,910,294'Abatement of NF.sub.3 with metal oxalates'19995,637,285'Process for nitrogen trifluoride synthesis'19975,569,151'Handling and delivery system for dangerous gases'19965,406,017'Methane conversion process'19955,286,565'Oxidation resistant carbon and method for making same'19944,983,373'Process for the production of high purity zirconium tetrafluoride and other fluorides'19914,769,508'Alkali promoted manganese oxide compositions containing titanium'19884,721,828'Methane conversion'19884,681,867'Supported fischer-tropsch catalyst and method of making the catalyst'19874,670,472'Fischer-Tropsch process'19874,670,619'Methane conversion process'19874,634,800'Methane conversion process'19874,629,718'Alkali promoted manganese oxide compositions containing silica and/or alkaline earth oxides'19864,593,139'Methane conversion'19864,568,789'Hydrocarbon dehydrogenation'19864,547,610'Methane conversion'19854,544,785'Methane conversion'19854,536,589'Polymers of ferrocene'19854,523,049'Methane conversion process'19854,489,215'Methane conversion'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–1999Patents assigned to ATLANTIC RICHFIELD CO (13)· patent assignee history
1984–1986Based in Pottstown, PA, US· patent location history
1985Patents assigned to DOW CHEMICAL CO (1)· patent assignee history
1985–1999Based in Douglassville, PA, US· patent location history
1987–2016Patents assigned to AIR PROD & CHEM (18)· patent assignee history
1988Based in Douglasville, PA, US· patent location history
1991–1994Based in Fleetwood, PA, US· patent location history
1996–2016Based in Breinigsville, PA, US· patent location history
2015Patents assigned to CIALKOWSKI EDWARD JAY (1)· patent assignee history
2015Patents assigned to HART JAMES JOSEPH (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AIR PROD & CHEM181987–2016
ATLANTIC RICHFIELD CO131984–1999
CIALKOWSKI EDWARD JAY12015
DOW CHEMICAL CO11985
HART JAMES JOSEPH12015
Locations
LocationPatentsSpan
Breinigsville, Pennsylvania, US141996–2016
Douglassville, Pennsylvania, US101985–1999
Pottstown, Pennsylvania, US41984–1986
Fleetwood, Pennsylvania, US21991–1994
Douglasville, Pennsylvania, US11988