Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method for recovering subsurface earth substances

Method for recovering subsurface earth substances

US Patent 4257650 · Granted Mar 24, 1981

Estimated economic value: $446,000 ⓘ

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Flowmeter for measuring the flow rate of a two phase fluid in a pipe1997
Petroleum reservoir flooding method1987
Recovery of oil by in situ hydrogenation1986
Superheated solvent method for recovering viscous petroleum1984
Method and apparatus for recovering high viscosity oils1984
Method for recovering high viscosity oils1983
Terpolymer of N-vinyl pyrrolidone in alkoxylated form1981
Miscible displacement oil recovery method1981
Steam flooding hydrocarbon recovery composition1980
Composition for recovering hydrocarbons1980
Composition and process for stimulating well production1980
Secondary recovery process1980