Abstract: The present invention relates to a process and system for the remediation and enhancement of secondary recovery gas from a natural gas well and geologic formation. The present invention employs the use of protic and aprotic solvents which are injected in sequence into the well and geologic formation. The protic and aprotic solvents are injected into the well bore and progress through the geologic fissures and pores of the geologic formation. After reacting with the downhole and geologic formation deposits, the solvent solute, containing the remaining solvent, dissolved solids and debris, and any remaining components are extracted from the well and formation resulting in improved gas well flow rate through the formation and well bore.

Abstract: The present invention relates to a process and system for the remediation and enhancement of secondary recovery gas from a natural gas well and geologic formation. The present invention employs the use of protic and aprotic solvents which are injected in sequence into the well and geologic formation. The protic and aprotic solvents are injected into the well bore and progress through the geologic fissures and pores of the geologic formation. After reacting with the downhole and geologic formation deposits, the solvent solute, containing the remaining solvent, dissolved solids and debris, and any remaining components are extracted from the well and formation resulting in improved gas well flow rate through the formation and well bore.

Abstract: This invention relates to a method for calibrating a wireless location system (WLS) to enable the system to make highly accurate differential measurements such as time difference of arrival (TDOA) and frequency difference of arrival (FDOA). Calibration is accomplished by transmitting a signal from an unknown location and measuring at each of two receivers the parameter to be calibrated from that part of the received signal reflected or refracted from an object at a known location in the area. A differential measurement error is determined by comparing the expected difference in the parameter measurements with the actual difference in the parameter measurements. The expected difference is known, a priori, based on the locations of the receivers and the location of the object.

Abstract: The present invention relates to a process and system for the remediation and enhancement of secondary recovery gas from a natural gas well and geologic formation. The present invention employs the use of protic and aprotic solvents which are injected in sequence into the well and geologic formation. The protic and aprotic solvents are injected into the well bore and progress through the geologic fissures and pores of the geologic formation. After reacting with the downhole and geologic formation deposits, the solvent solute, containing the remaining solvent, dissolved solids and debris, and any remaining components are extracted from the well and formation resulting in improved gas well flow rate through the formation and well bore.

Abstract: The location of a transmitter can be determined using a proxy receiver, such as a natural landmark or man-made structure, which reflects and/or refracts the signal from a transmitter toward a receiver. A processor is operatively connected to the receiver and determines the location of the transmitter based on a multilateration calculation that includes the Time of Arrival of the transmitted signal at the proxy receiver and the known or calculated location of the proxy receiver as inputs.

Abstract: A system and method determines the location of a transmitter. At least one receiver receives a signal from the transmitter and at least one proxy receiver is an object that reflects and/or refracts a signal along an arriving path to the at least one receiver. A processor is operative with the at least one receiver and determines the location of the at least one proxy receiver based on one of querying a look-up table or extracting image features from the mapping system and determining the location of the transmitter based on the time of arrival and at least one of angle of arrival of signals from the at least one proxy receiver and transmitter.

Abstract: This invention relates to a method for calibrating a wireless location system (WLS) to enable the system to make highly accurate differential measurements such as time difference of arrival (TDOA) and frequency difference of arrival (FDOA). Calibration is accomplished by transmitting a signal from an unknown location and measuring at each of two receivers the parameter to be calibrated from that part of the received signal reflected or refracted from an object at a known location in the area. A differential measurement error is determined by comparing the expected difference in the parameter measurements with the actual difference in the parameter measurements. The expected difference is known, a priori, based on the locations of the receivers and the location of the object.

Abstract: This invention relates to a method for calibrating a wireless location system (WLS) to enable the system to make highly accurate differential measurements such as time difference of arrival (TDOA) and frequency difference of arrival (FDOA). Calibration is accomplished by transmitting a signal from an unknown location and measuring at each of two receivers the parameter to be calibrated from that part of the received signal reflected or refracted from an object at a known location in the area. A differential measurement error is determined by comparing the expected difference in the parameter measurements with the actual difference in the parameter measurements. The expected difference is known, a priori, based on the locations of the receivers and the location of the object.

Abstract: This invention relates to a method for calibrating a wireless location system (WLS) to enable the system to make highly accurate differential measurements such as time difference of arrival (TDOA) and frequency difference of arrival (FDOA). Calibration is accomplished by transmitting a signal from an unknown location and measuring at each of two receivers the parameter to be calibrated from that part of the received signal reflected or refracted from an object at a known location in the area. A differential measurement error is determined by comparing the expected difference in the parameter measurements with the actual difference in the parameter measurements. The expected difference is known, a priori, based on the locations of the receivers and the location of the object.

Abstract: A system and method determines the location of a transmitter. At least one receiver receives a signal from the transmitter and at least one proxy receiver is an object that reflects and/or refracts a signal along an arriving path to the at least one receiver. A processor is operative with the at least one receiver and determines the location of the at least one proxy receiver based on one of querying a look-up table or extracting image features from the mapping system and determining the location of the transmitter based on the time of arrival and at least one of angle of arrival of signals from the at least one proxy receiver and transmitter.

Abstract: The location of a transmitter can be determined using a proxy receiver, such as a natural landmark or manmade structure, which reflects and/or refracts the signal from a transmitter toward a receiver. A processor is operatively connected to the receiver and determines the location of the transmitter based on a multilateration calculation that includes the Time of Arrival of the transmitted signal at the proxy receiver and the known or calculated location of the proxy receiver as inputs.

Abstract: New N-substituted compounds, useful as metal deactivators in functional fluids, have the formula I: ##STR1## in which R.sub.1 and R.sub.2 are the same or different and each is C.sub. -C.sub.20 alkyl, C.sub.3 -C.sub.20 alkenyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.7 -C.sub.13 aralkyl, C.sub.6 -C.sub.10 aryl, or R.sub.1 and R.sub.2, together with the nitrogen atom to which they are each attached form a 5-, 6- or 7-membered heterocyclic residue, or R.sub.1 and R.sub.2 is each a residue of formula II:R.sub.3 X[(alkylene)O].sub.n (alkylene)-- IIin which X is O, S or N, R.sub.3 is hydrogen or C.sub.1 -C.sub.20 alkyl, alkylene is a C.sub.1 -C.sub.12 alkylene residue and n is 0 or an integer from 1 to 6, or R.sub.1 has its previous significance and R.sub.2 is a residue of formula III: ##STR2## or R.sub.2 is a residue of formula III as defined above R.sub.1 is a residue of formula IV:--[alkylene].sub.n --N(R.sub.4)--A--[N(R.sub.4).sub.2 ].sub.

Abstract: New cotelomer compounds having the formula I ##STR1## and salts thereof wherein A is a random polymeric residue comprising at least one unit of formula II ##STR2## and at least one unit of formula III, different from a unit of formula II, ##STR3## and B is hydrogen or a residue A; wherein m and n are integers such that the sum of m+n is an integer of from 3 to 100, the ratio of n:m being from 99 to 1:1 to 99, provided that the resulting telomers are water-soluble and wherein m and/or n in a residue A may be the same as or different from m and/or n in a residue B; R is hydrogen, methyl or ethyl;R.sub.1 is a residue -OX, wherein X is hydrogen, an alkali- or alkaline earth metal, ammonium or an amine residue;R.sub.2 is hydrogen, methyl or a residue --CO.sub.2 R.sub.5, wherein R.sub.5 is hydrogen or a straight- or branched chain alkyl residue having 1 to 8 carbon atoms;R.sub.3 is hydrogen, a straight- or branched chain alkyl residue having 1 to 4 carbon atoms, hydroxymethyl or a residue --CO.sub.2 R.sub.

Abstract: Process for the absorption of hydrogen sulphide impurity from gases or liquid hydrocarbons comprising:(a) washing the gas or liquid hydrocarbon containing hydrogen sulphide with an aqueous alkaline solution of(a1) one or more compounds having the formula: ##STR1## or a water-soluble salt thereof, wherein m is 0 or 1 and R is a hydrogen atom or a methyl or carboxy group, and(a2) one or more compounds of a metal capable of existing in at least two valency states;(b) removing sulphur formed by oxidation of hydrogen sulphide; and(c) re-oxidizing the hydroquinone formed from reduction of the compound of formula I.

Abstract: Lubricating oil compositions, comprising as additive, from 0.001 to 10% by weight, based on the weight of the total composition, of a 1- or 3-aminomethyl-hydantoin or a 1,3-diaminomethyl-hydantoin.

Abstract: A lubricating oil composition comprising 0.001% to 10%, based on the total lubricating composition, of a compound of formula I: ##STR1## wherein x is an integer from 1 to 25; R, R.sup.1 and R" are the same or different and each is hydrogen, an optionally substituted straight- or branched-chain alkyl residue having from 1 to 20 carbon atoms, an alkenyl or alkynyl residue having from 2 to 12 carbon atoms, an optionally substituted cycloalkyl residue having from 3 to 12 carbon atoms, an optionally substituted aryl residue having from 6 to 10 carbon atoms, an optionally substituted aralkenyl or aralkynyl residue each having from 8 to 12 carbon atoms, an optionally substituted aralkyl residue having from 7 to 20 carbon atoms or an optionally substituted heterocyclic residue having from 3 to 10 ring members, an alkylene residue having from 2 to 12 carbon atoms, a cycloalkylene residue having from 5 to 12 carbon atoms or an arylene residue having from 6 to 10 carbon atoms; or R is the group -(S).sub.

Abstract: New alkyl substituted p-hydroxy aryl esters and alkyl substituted p-hydroxy aralkyl esters of 2,2,6,6-tetrasubstituted piperidin-4-ols are used as stabilizers for organic materials, especially for polymers.

Abstract: New 1- and 4-substituted piperidines are stabilizers for organic material. They are produced by reacting corresponding 1-substituted piperidinols with acid chlorides or corresponding 4-substituted piperidines with a compound introducing into the 1-positon a residue.

Abstract: New 1- and 4-substituted piperidines are stabilizers for organic material. They are produced by reacting corresponding 1-substituted piperidinols with acid chlorides or corresponding 4-substituted piperidines with a compound introducing into the 1-positon a residue.

Abstract: New 1- and 4-substituted piperidines are stabilizers for organic material. They are produced by reacting corresponding 1-substituted piperidinols with acid chlorides or corresponding 4-substituted piperidines with a compound introducing into the 1-position a residue.