Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › High temperature stable aqueous brine fluids viscosified by N-heterocyclic organophosphorus compounds

High temperature stable aqueous brine fluids viscosified by N-heterocyclic organophosphorus compounds

US Patent 4481120 · Granted Nov 6, 1984

Estimated economic value: $5,292,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Process for inhibiting scale formation1990
High temperature stable aqueous brine fluids viscosified by polyvinylpyrrolidone1988
Controlled release dispersant for clay-thickened, water-based drilling fluids1987
Process for selectively extracting dissolved salts from aqueous media1987
Additive systems for control of fluid loss in aqueous drilling fluids at high te1986
High temperature stable aqueous brine fluids viscosified by water-soluble copoly1986
High temperature stable aqueous brine fluids1986
Vinyl sulfonate amide copolymer and terpolymer combinations for control of filtr1986
High temperature stable fluids for wellbore treatment containing non-aqueous sol1985
High temperature stable drilling fluids containing non-aqueous solvents1985
Acidic high temperature stable aqueous brine fluids viscosified by basic N-heter1984
Solvent extraction production of lube oil fractions1983