CHEMICAL METHODS 965 



2,374,227 Issued April 24, 1945. Herbert E. Metcalf. "Geochemical Prospecting 

 System." 



2,374,937 Issued May 1, 1945. Leo Horvitz. "Geochemical Well Logging." 



2,375,949 Issued May 15, 1945. Robert Thomas Sanderson. "Geochemical Pros- 

 pecting." 



2,376,145 Issued May 15, 1945. Leo Horvitz. "Gas Analysis." 



2,376,366 Issued May 22, 1945. Reed C. Lawlor and Herbert E. Metcalf. "Geochem- 

 ical Prospecting System." 



2,377,082 Issued May 29, 1945. Bela Hubbard. "Geochemical Prospecting." 



2.379.045 Issued June 26, 1945. Henry F. Sturgis. "Analyzing Earth Formations." 

 2,382,992 Issued Aug. 21, 1945. Jesse Stewart Harris. "Soil Sampling Apparatus." 

 2,386,832 Issued Oct. 16, 1945. Wladimir M. Zaikowsky. "Method of Obtaining Soil 



Gas Samples." 



2,387,513 Issued Oct. 23, 1945. C. R. Hocott. "Well Logging." 



2,389,706 Issued Nov. 27, 1945. Philip S. Williams and Monroe W. Kriegel. "Appa- 

 ratus for Gas Analysis." 



2,393,092 Issued Jan. 15, 1946. R. L. Doan. "Apparatus for Gas Analysis of Drilling 

 Mud." 



2,393,650 Issued Jan. 29, 1946. Herbert E. Metcalf. "Apparatus for Analyzing 

 Hydrocarbons." 



2,393,674 Issued Jan. 29, 1946. Wladimir M. Zaikowsky. "Apparatus for Gas 

 Analysis." 



2,394,703 Issued Feb. 12, 1946. Edward Lipson. "Soil Analysis by Radiant Energy." 



2,395,014 Issued Feb. 19, 1945. Edwin E. Roper. "Geochemical Prospecting." 



2,398,580 Issued April 16, 1946. F. W. Crawford. "Method of Prospecting for 

 Hydrocarbons." 



2,399,965 Issued May 7, 1946. Reinhold Weber. "Method for Determining Combus- 

 tible Gases in Gas Mixtures." 



2.400.046 Issued May 7, 1946. F. E. Hummel. "Mud Logging System." 

 2,400,420 Issued May 14, 1946. Leo Horvitz. "Geochemical Prospecting." 



2,403,002 Issued July 2, 1946. H. L. Johnson. "Apparatus for Undisturbed Over- 

 burden Sampling." 



2,403,631 Issued July 9, 1946. C. B. Brown. "Method for Determining the Petroleum 

 Hydrocarbon Content of Earth Samples." 



2,406,611 Issued Aug. 27, 1946. Harvey T. Kennedy. "Geochemical Prospecting 

 Method." 



2.408.964 Issued Oct. 8, 1946. W. E. Winn and Patrick F. Dougherty. "Method of 

 Logging Wells." 



2.408.965 Issued Oct. 8, 1946. W. E. Winn and Patrick F. Dougherty. "Method of 

 Logging Wells." 



2,412,237 Issued Dec. 10, 1946. H. W. Washburn and D. D. Taylor. "Mass Spec- 

 trometry." 

 2,412,359 Issued Dec. 10, 1946. Edwin E. Roper. "Ionic Analysis." 

 2,414,876 Issued Jan. 28, 1947. Leo Horvitz. "Gas Analysis." 

 2,414,913 Issued Jan. 28, 1947. Philip S. Williams. "Soil Gas Prospecting." 

 2,422,852 Issued June 24, 1947. G. L. Ratcliffe. "Process of Detecting Oil Dispersed 



in Well Drilling Fluids." 

 2,423,774 Issued July 8, 1947. J. J. Heigl. "Oil Determination." 

 2,427,261 Issued Sept. 9, 1947. F. W. Crawford. "Method for Analyzing Gas." 

 2,431,019 Issued Nov. 18, 1947. R. B. Barnes. "Multicomponent-Gas Analyzer." 

 2,431,487 Issued Nov. 25, 1947. D. H. Larsen. "Oil Detection in Drilling Muds." 

 2,437,045 Issued March 2, 1948. E. E. Roper. "Determination of Hydrocarbon Con- 

 centration in Soil Samples." 

 2,442,476 Issued June 1, 1948. M. S. Taggart, Jr. "Prospecting for Petroleum 



Deposits." 

 2,449,627 Issued Sept. 21, 1948. W. J. Sweeney. "Oil Prospecting Method." 

 2,451,885 Issued Oct. 19, 1948. R. M. Squires and N. P. Stevens. "Geophysical 



Prospecting." 

 2,459,512 Issued Jan. 18, 1949. R. H. Fash and J. G. Campbell. "Petroleum Explora- 

 tion by Soil Analysis." 



2.465.563 Issued March 29, 1949. A. J. Abrams. "Geophysical Prospecting Method." 



2.465.564 Issued Mar. 29, 1949. A. J. Abrams. "Location of Buried Hydrocarbon 

 Deposits." 



