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| Number | Title | Issue Date |
| 4431842 | Catalytic preparation of nitroalkanes A process of making nitroalkanes which comprises reacting a lower alkanol, e.g. methanol, and nitric acid (HNO3) in the vapor phase in the presence of a catalyst which is an oxide or a salt of a metal of Group II of the periodic table, e.g. cal... | 02/14/1984 |
| 4431843 | Methyl substituted oxobicyclo-4,4,0-decane derivatives, process for preparing same and organoleptic uses thereof Described are compounds having the generic structure: ##STR1## wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond; wherein X represents the moieties: ##STR2## wherein R1, R2, R | 02/14/1984 |
| 4431844 | Preparation of polyunsaturated ketones An improved process for the preparation of unsaturated ketones of the general formula I ##STR1## where R1 is --CH3, ##STR2## and R2 and R3 are different and each is H or --CH3, by react... | 02/14/1984 |
| 4431845 | Method for the preparation of hydroxyl-terminated poly(haloalkylene ethers) A method for the preparation of hydroxyl-terminated poly(haloalkylene ethers) is disclosed wherein a catalyst system comprising a fluorinated acid and a polyvalent tin compound is utilized.... | 02/14/1984 |
| 4431846 | Reduction of o-ethylphenol in m,p-cresol by preferential t-butylation A process is disclosed for reducing the concentration of o-ethylphenol in m,p-cresol by partially t-butylating a mixture of the above and equilibrating the resultant mixture to convert o-ethylphenol and its 6-t-butyl derivative to the thermodynamically mo... | 02/14/1984 |
| 4431847 | Method for removing brominated phenolic waste A process for forming a substantially insoluble solid polymer from halogeneated phenolic compounds dissolved in a liquid medium using an oxidizing agent. NaOCl and NaOBr are used as oxidizing agents to initiate the polymerization reaction among the haloge... | 02/14/1984 |
| 4431848 | Preparation of resorcinol and substituted resorcinols by liquid-phase dehydrogenation of 1,3-cyclic diones derived by vapor-phase cyclization of delta-keto carboxylic acid esters A process is disclosed for making resorcinol and substituted resorcinols by a first reaction step of vapor-phase cyclization of a delta-keto carboxylic acid ester over a carbon catalyst bed to form a 1,3-cyclic dione intermediate. The delta-keto ester is ... | 02/14/1984 |
| 4431849 | Process for preparing a methyl phenol A process for preparing a methyl phenol from a tertiary hydroperoxide in an oxidation product of an alkylbenzene of the general structural formula ##STR1## wherein R is a secondary alkyl group and n is an integer of 1 to 3, which comprises hydrogenat... | 02/14/1984 |
| 4431850 | Low temperature hydrodealkylation of alkylated phenols A process for thermal dealkylation of alkylated phenols feedstocks, which comprises reacting a feed mixture containing mono and poly-alkylated phenols and gaseous hydrogen at temperature ranging from about 900° to about 1100° F. at hydrogen partial pres... | 02/14/1984 |
| 4431851 | 3-(Hydroxyalkyl)-3,4-dihydro-1-orthohalophenyl naphthalenes The present invention concerns compounds of the formula ##STR1## wherein n=1, 2 or 3; and R' represents phenyl or orthofluorophenyl. Said compounds are used as intermediates in the preparation of heterocyclic aminoalkyl derivatives which are useful ... | 02/14/1984 |
| 4431852 | Halohydrins Compounds of the formula: ##STR1## wherein R and R1, which may be the same or different, are hydrogen or alkyl; X, Y and Z are each independently hydrogen, chlorine or fluorine and A is chlorine or bromine, are prepared by reacting a terti... | 02/14/1984 |
| 4431853 | Dicyclohexylethane derivatives A 1,2-di[trans(equatorial-equatorial)cyclohexyl]-ethane derivative of the following general formula ##STR1## wherein R and R', independently from each other, represent a linear alkyl group having 1 to 10 carbon atoms.... | 02/14/1984 |
| 4431854 | Continuous preparation of ethylbenzene in a heterogeneous-phase reaction A process for the continuous preparation of ethylbenzene in a heterogeneous-phase reaction by alkylating benzene with ethylene in the presence of a catalyst based on a complex organic aluminum chloride compound and a co-catalyst at an elevated temperature... | 02/14/1984 |
| 4431855 | Reduced polymer formation in disproportionation reaction by addition of CO to feed In an olefin disproportionation reaction, the formation of undesirable polymer is inhibited by the inclusion of a small amount of carbon monoxide in the feed.... | 02/14/1984 |
| 4431856 | Fluid zeolite catalyst conversion of alcohols and oxygenated derivatives to hydrocarbons Alcohols and related oxygenates are converted in a riser reactor and dense fluid catalyst bed comprising ZSM-5 type catalyst circulated through a plurality of satellite stripping-cooling zones for temperature control. Catalyst utilized comprises from 5 to... | 02/14/1984 |
| 4431857 | Modification of hydrocarbon conversion processes over crystalline borosilicate catalysts by addition of water Incorporation of above about 50 ppm water into feed of a hydrocarbon conversion process using an AMS-1B crystalline borosilicate-based catalyst alters the product distribution produced in such process.... | 02/14/1984 |
| 4431858 | Method of making quasi-grain boundary-free polycrystalline solar cell structure and solar cell structure obtained thereby A new solar cell structure is provided which will increase the efficiency of polycrystalline solar cells by suppressing or completely eliminating the recombination losses due to the presence of grain boundaries. This is achieved by avoiding the formation ... | 02/14/1984 |
| 4431859 | Bushing for gas-insulated electrical equipment The invention comprises a bushing surrounding an electrical conductor, including a porcelain tube which employs a gaseous insulator, an insulating tube disposed with a space of small volume set relative to the inner periphery of the porcelain tube, the sm... | 02/14/1984 |
| 4431860 | Multistranded component conductor continuously transposed cable This invention relates to an electrical cable useful in large power transformers and reactors. The cable is composed of a plurality of separate ropes which are generally of the same size and configuration which may be combined in accordance with a predete... | 02/14/1984 |
| 4431861 | Heat recoverable article for high voltage cable terminations and splices and method for making termination and splices using same Terminations and splices in high voltage electrical cable can be shielded by shrinking over the termination or splice a heat recoverable hollow article which comprises a heat-shrinkable outer sleeve whose outer surface is anti-tracking at voltages of 2.5 ... | 02/14/1984 |
| 4431862 | Multiwire conductor having increased interwire resistance and good mechanical stability and method for making same An improved multiwire conductor of the type which is mechanically stabilized by a solder filler. A solder filled conductor is heated to a temperature sufficient to make the solder brittle, but below the melting point of the solder. While still hot, the co... | 02/14/1984 |
| 4431863 | Protective boot for cables and method of applying same A boot forming member for externally and internally covering end portions of rods surrounding a cable. The boot forming member includes a flat sheet of elastomeric material wrappable around the cable when the rod end portions are spaced outwardly from the... | 02/14/1984 |
| 4431864 | Communications system input-output converter An input-output converter permits the integration of terminals and transmit and receive equipments that operate at given logic voltage levels and character formats into communications system that operate at different logic voltage levels and character for... | 02/14/1984 |
| 4431865 | Digital signal enciphering and deciphering apparatus and system A digital signal of n-bit words Ni is enciphered into an enciphered signal of n-bit words Ri. In an enciphering unit, a logic circuit delivers each enciphered word Ri through a logic operation g performed on the word N | 02/14/1984 |
| 4431866 | Electronic apparatus with vocal output An electronic apparatus capable of producing a voiced output representing various data input thereto and the results of operations on the input data includes a system for inhibiting the voiced output of data that is unnecessary to the operator. For exampl... | 02/14/1984 |
| 4431867 | Modem with low part count and improved demodulator An FSK modem for coupling a standard data port (50) to a telephone line (45) in which the signal path between the phone line and the data port passes through a processor (55). The same frequency detection apparatus (83, 192, 180) is used to both demodulat... | 02/14/1984 |
| 4431868 | Solid state telephone line interface circuit with ringing capability A telephone line circuit including a high voltage amplifier feeds the tip and ring lines at its output. This amplifier is fed by a programmable voltage source which includes a d.c./d.c. converter and means to control the amplitude and polarity of this vol... | 02/14/1984 |
| 4431869 | Telephone line feed In a telephone line feeding arrangement, the line current is monitored by a multi-resistor network (Rp Rs) and the output of the network applied to the inputs of an operational amplifier (A3). The output of this amplifier, which is a... | 02/14/1984 |
| 4431870 | Telephone system with computer generated dial pad and automatic dialing A computer input/output device is disclosed for performing the functions of a telephone. More particularly, an input/output device is disclosed particularly adapted for use with computer communication equipment. The subject device includes a video display... | 02/14/1984 |
| 4431871 | Solid state relay A solid state relay provides for a discontinuous transfer contact function. The solid state relay includes a first field effect transistor (FET) in a first switch, and second and third FETs in a second switch. The first and second FETs are each connected ... | 02/14/1984 |
| 4431872 | Telecommunication receivers A DTMF telecommunication receiver in which an additional DTMF receiver circuit is provided tuned to a particular pair of tones. Detection of the particular tones opens a switch in the audio output line and eliminates crosstalk in the hybrid circuit making... | 02/14/1984 |
| 4431873 | Diaphragm design for a bender type acoustic sensor An omnidirectional acoustic sensor has an air-backed diaphragm in a unit which has a central axis and is mounted so as to be responsive to acoustic pressure waves. A piezoelectric ceramic disc is attached to each face of the diaphragm. This combination fo... | 02/14/1984 |
| 4431874 | Balanced current multiplier circuit for a subscriber loop interface circuit A balanced multiplier circuit for a subscriber loop interface circuit (SLIC) which provides both loop current to a two-wire bidirectional subscriber loop and suppression of longitudinal signals generated at the two-wire loop input to the SLIC while mainta... | 02/14/1984 |
| 4431875 | Signalling and channel loop test circuits for station carrier telephone system A plural channel amplitude modulated station carrier telephone system having a special synchronous ring detector circuit located in a station or terminal at the subscriber's end of the transmission line for signaling an incoming call for the subscriber's ... | 02/14/1984 |
| 4431876 | Key switch A key switch comprises a casing, at least one key slide guided in the cas against the force of a spring and at least one J-shaped leaf spring having a long spring arm and a short spring arm connected to the long arm by a curved intermediate part, the lea... | 02/14/1984 |
| 4431877 | Thermal shield for circuit breaker operating spring A thermal shield is employed with a circuit breaker operating spring to protect the spring from thermal degradation during contact arcing. One embodiment includes an ablative plastic coating on the outer surface of the shield to promote arc quenching.... | 02/14/1984 |
| 4431878 | Compression piston switch A compression piston switch is provided with two switching parts which are mutually axially displaceable. The switch also has a device which is connected to a first one of the two switching parts for guiding a quenching gas flow. The quenching gas, which ... | 02/14/1984 |
| 4431879 | Illumination-type pushbutton switch construction Disclosed is an illumination-type pushbutton switch construction including an operation section slidably arranged in a switch housing and a switch operating section for actuating a switch section in cooperation with the operation section, wherein the oper... | 02/14/1984 |
| 4431880 | Rocker switch with integrally defined retention means for resistor and lamp A rocker switch has a spring biased movable contact which is continually connected to an electrical potential source and a lamp in the actuator has one lead connected to this spring and the other to a uniquely located resistor such that the resistor is co... | 02/14/1984 |
| 4431881 | Pushbutton drive for key contacts A pushbutton drive for key contacts is disclosed. The disclosed drive is provided with a mushroom button which is loaded by a restoring force and which includes a mushroom stem movably guided in a housing. The stem has a rest position, and an operating po... | 02/14/1984 |
