Assignee
TERRA TEK INC
18 granted patents·1,121 citations·filing 1976–1991
Top patents by PatentIndex Score
18 records- 0197US5322019ASystem for the initiation of downhole explosive and propellant systemsTERRA TEK INC·Filed 1991·Granted Jun 21, 1994·138 cites·45 claims
- 0295US4547468AHollow proppants and a process for their manufactureTERRA TEK INC·Filed 1983·Granted Oct 15, 1985·165 cites·17 claims
- 0394US4384613AMethod of in-situ retorting of carbonaceous material for recovery of organic liquids and gasesTERRA TEK INC·Filed 1980·Granted May 24, 1983·333 cites·11 claims
- 0492US4634315AForced refreezing method for the formation of high strength ice structuresTERRA TEK INC·Filed 1985·Granted Jan 6, 1987·62 cites·11 claims
- 0590US4299120AMethod for determining plane strain fracture toughness of non-elastic fracture mechanics specimensTERRA TEK INC·Filed 1979·Granted Nov 10, 1981·55 cites·9 claims
- 0686US4152941AProcess for measuring the fracture toughness of rock under simulated down-hole stress conditionsTERRA TEK INC·Filed 1978·Granted May 8, 1979·48 cites·5 claims
- 0784US4198953ASolar illuminated energy conserving greenhouseTERRA TEK INC·Filed 1978·Granted Apr 22, 1980·86 cites·21 claims
- 0882US4198870AConstant point of load application fracture specimen loading machineTERRA TEK INC·Filed 1978·Granted Apr 22, 1980·33 cites·20 claims
- 0974US4116049AMethod for measuring plane strain fracture toughnessTERRA TEK INC·Filed 1977·Granted Sep 26, 1978·24 cites·4 claims
- 1071US4182215AFailsafe hydraulic prestressing nutTERRA TEK INC·Filed 1978·Granted Jan 8, 1980·33 cites·13 claims
- 1170US4679441APressure balanced loading piston for triaxial test cellsTERRA TEK INC·Filed 1986·Granted Jul 14, 1987·30 cites·9 claims
- 1270US4241796AActive drill stabilizer assemblyTERRA TEK INC·Filed 1979·Granted Dec 30, 1980·40 cites·31 claims
- 1357US4044828AProcess for direct measurement of the orientation of hydraulic fracturesTERRA TEK INC·Filed 1976·Granted Aug 30, 1977·23 cites·4 claims
- 1455US4462617AHigh pressure rotary couplingTERRA TEK INC·Filed 1981·Granted Jul 31, 1984·20 cites·7 claims
- 1547US4075884AFracture specimen loading machineTERRA TEK INC·Filed 1977·Granted Feb 28, 1978·9 cites·21 claims
- 1640US4289036AGauge for measuring the mouth opening displacement of fracture toughness test specimensTERRA TEK INC·Filed 1980·Granted Sep 15, 1981·7 cites·4 claims
- 1736US4630868AProcess for solution miningTERRA TEK INC·Filed 1981·Granted Dec 23, 1986·9 cites·8 claims
- 1829US4637217ARapid construction of ice structures with chemically treated sea waterTERRA TEK INC·Filed 1985·Granted Jan 20, 1987·6 cites·13 claims
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