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Inventor

John H. Hallman

Inventor
New Waverly, TX, US

Overview

12→
Patents
1986–2019
Patent span
Chemistry
Primary field (CPC C)

Patents· 12 as inventor

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

C09Kprimary
C09KMaterials for miscellaneous applications, not provided for elsewhere32%
C07CAcyclic or carbocyclic compounds16%
B01DSeparation11%
E21BEarth or rock drilling11%
E03BInstallations or methods for obtaining, collecting, or distributing water5%
F02CGas-turbine plants5%
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids5%
F04DNon-positive-displacement pumps5%
F16NLubricating5%
Y10TTechnical subjects covered by former us classification5%
PatentTitleYear
10,240,452Reservoir analysis with well pumping system20197,713,435'Heat exchange fluids comprising amine carboxylates'20107,452,480'Heat exchange fluids'20087,060,198'Heat exchange fluids comprising amine carboxylates'20067,028,771'Hydrocarbon recovery'20066,952,925'Optimizing inlet air for gas turbines'20056,896,718'Gas dehydration with cavitation regeneration of potassium formate dehydrating solution'20056,893,582'Method of heating a fluid using a line heater comprising an alkali metal formate'20056,666,906'Gas dehydration using membrane and potassium formate solution'20036,659,123'Maintaining readiness in fire hydrants'20034,844,691'Centrifugal liquid pump with cavitation surge suppression'19894,631,009'Lubrication scavenge system'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1989Patents assigned to SUNDSTRAND CORP (2)· patent assignee history
1986–1989Based in Rockford, IL, US· patent location history
2003–2010Patents assigned to CLEARWATER INT LLC (8)· patent assignee history
2003–2010Based in New Waverly, TX, US· patent location history
2005Based in Willis, TX, US· patent location history
2008Patents assigned to WEATHERFORD LAMB (1)· patent assignee history
2019Patents assigned to WEATHERFORD TECH HOLDINGS LLC (1)· patent assignee history
2019Based in Montgomery, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CLEARWATER INT LLC82003–2010
SUNDSTRAND CORP21986–1989
WEATHERFORD LAMB12008
WEATHERFORD TECH HOLDINGS LLC12019
Locations
LocationPatentsSpan
New Waverly, Texas, US82003–2010
Rockford, Illinois, US21986–1989
Montgomery, Texas, US12019
Willis, Texas, US12005