Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 4789402 | Mannich reaction product as asphalt antistripping agent An asphalt cement mixture is disclosed. The mixture has improved antistripping properties due to the inclusion therein of a minor amount of an antistripping agent produced by the condensation reaction of an amine, an aldehyde or aldehyde reaction synthon ... | 12/06/1988 |
| 4787938 | Countercurrent drum mixer asphalt plant A drum mixer asphalt plant is provided with a rotatable cylinder 10 in which virgin aggregate, recycle material and liquid asphalt are mixed to produce an asphaltic composition and the hot gas stream for heating and drying the materials flow in countercur... | 11/29/1988 |
| 4750984 | Method of producing asphalt A method of producing high quality, homogenous asphalt comprising the steps of mixing and heating a hydrocarbon feedstock not normally suited for asphalt production with elemental sulfur and agitating the resulting mixture. A halide catalyst may be added ... | 06/14/1988 |
| 4713117 | Method for producing industrial asphalts without air-blowing using an organic sulfonic acid Disclosed is a one-step method of producing an industrial asphalt from a bituminous material which comprises mixing together without air-blowing: (a) a feed material comprising a bituminous material having a viscosity of at least 50 centistokes at 350 degrees ... | 12/15/1987 |
| 4639307 | Method for producing industrial asphalts Disclosed is a one-step method of producing an industrial asphalt from a bituminous material which comprises mixing together without air-blowing: (a) a feed material comprising a bituminous material having a viscosity of at least 50 centistokes at 350 degrees ... | 01/27/1987 |
| 4623395 | Method for producing industrial asphalts without air-blowing using maleic anhydride Disclosed is a one-step method of producing an industrial asphalt from a bituminous material which comprises mixing together without air-blowing: (a) a feed material comprising a bituminous material having a viscosity of at least 50 centistokes at 350 degrees ... | 11/18/1986 |
| 4618372 | Method for producing industrial asphalts without air-blowing using hydrobromic acid Disclosed is a one-step method of producing an industrial asphalt from a bituminous material which comprises mixing together without air-blowing: (a) a feed material comprising a bituminous material having a viscosity of at least 50 centistokes at 350 degrees ... | 10/21/1986 |
| 4617062 | Roofing asphalt compositions containing hydrocracked pitch The present invention relates to a roofing grade asphalt composition which comprises a blend of (a) a petroleum pitch obtained as a residue in the hydrocracking of hydrocarbon oils and (b) as a diluent therefor preferably a paving grade asphalt cement of ... | 10/14/1986 |
| 4584023 | Method for producing industrial asphalts without air-blowing using phytic acid Disclosed is a one-step method of producing an industrial asphalt from a bituminous material which comprises mixing together without air-blowing: (a) a feed material comprising a bituminous material having a viscosity of at least 50 centistokes at 350 degrees ... | 04/22/1986 |
| 4479827 | Asphalt compositions An asphalt binder composition useful with aggregate particles. The asphalt binding composition comprises: (1) a medium curing liquid asphalt, and (2) from about 0.1 to 13.5% by weight tall oil based on the weight of the medium curing liquid asphalt. An ag... | 10/30/1984 |
| 4452721 | Suspensions containing microfibrillated cellulose A suspension of a finely divided material in a liquid suspending medium which swells cellulose, the suspension containing microfibrillated cellulose in an amount sufficient to produce a stable, homogeneous suspension. The finely divided material is a dens... | 06/05/1984 |
| 4437896 | Synthetic asphalt mixtures and processes for making them Synthetic asphalt mixtures comprise selective blends of tall oil and/or tall oil pitch and naturally occurring or man-made gilsonite.... | 03/20/1984 |
| 4382989 | Roofing asphalt formulation The present invention is an asphaltic composition which is useful as a roofing asphalt formulation and method of making this formulation. The composition includes about 39 to 99 percent by weight of oxidized asphalt and between 1 and about 8 percent of ox... | 05/10/1983 |
| 4373960 | Asphalt compositions and method for paving An asphalt binder composition useful with mineral aggregate particles to form a patching composition for the repair of roads. The asphalt binder composition comprises: (1) a medium curing liquid asphalt, (2) from about 0.1 to 13.5% by weight tall oil base... | 02/15/1983 |
| 4371400 | Mastic asphalt composition A mastic asphalt composition is disclosed which comprises, in addition to the mastic asphalt, 0.2 to 5 wt. % of a crystalline, powdered, synthetic zeolite or zeolite mixture. In addition, the mastic asphalt composition may further contain precipitated sil... | 02/01/1983 |
| 4267085 | Injection materials for railroad track beds In a railroad track bed an injected layer is formed between the railroad ties and the roadbed so as to protect the latter. The injected layer is composed of an injection material injected through openings formed in the tie. The injection material has a vi... | 05/12/1981 |
| 4260423 | Kiln tar binder and method of producing it A bituminous binder, useful in the production of form coke, is obtained by reacting kiln tar recovered from a form coke oven with formaldehyde in the presence of a mineral base until the ASTM Ring and Ball softening point is at least about 58° C. Calcium... | 04/07/1981 |
| 4247335 | Asphalt composition resistant to weathering Paving-grade asphalt compositions having improved resistance to weathering are described which are obtained by incorporating into a paving-grade asphalt either (1) the product obtained by alkylating phenol with a resin oil, i.e., a hydrocarbon fraction of... | 01/27/1981 |
| 4243426 | Asphalt compositions modified with organo-silane compounds A bitumen composition modified with an organo silane in which a bitumen such as asphalt is reacted with an organo silane containing ethylenic unsaturation or an organo silane containing at least one hydrogen atom bonded to the silicon atom whereby the org... | 01/06/1981 |
| 4207117 | Asphaltic compositions Asphalt compositions are provided containing a ductility improving amount of a refinery stream obtained in the form of a bottoms fraction from a thermofor catalytic cracking or fluid catalytic cracking operation.... | 06/10/1980 |
| 4156440 | Railroad track bed using injection materials and method therefor In a railroad track bed, an injection layer is formed between the railroad ties and the raodbed so as to protect the latter. The injected layer is composed of an injection material injected through openings formed in the tie. The injection material has a ... | 05/29/1979 |
| 4153471 | Process for treating exhaust gaseous mixtures from directly exposing asphalt-aggregate compositions to hot gases The process of the invention comprises directly exposing asphalt-aggregate compositions to hot gases of combustion in which a resulting gaseous mixture comprises mineral particulate matter, nitrogen, carbon dioxide, water vapor, and volatile hydrocarbons ... | 05/08/1979 |
| 4116708 | Asphalt coating compositions Disclosed are: (1) A primer coating composition containing an air-blown, solvent extracted asphalt having a penetration of about 1 to about 12 and a softening point of about 150° to about 270° F; (2) a blend of 70-92 parts by weight of an air-blown, sol... | 09/26/1978 |
| 4109471 | Method of covering the bottom surface in a gas cavern Method for depositing a layer or carpet of bitumen in an underground cavern which has a water sump layer in the bottom, and which is used for storing gaseous hydrocarbons, whereby the deposited bitumen carpet minimizes the vaporization of the cavern water... | 08/29/1978 |
| 4082515 | Coke oven system and agglomerating carryover fines therein A coke oven system is provided having a coke oven preferably with pipeline charging for converting coal into coke. Carryover fines are collected from the coke oven and preferably a preheater therefor, and then agitated by agitator means and the collected ... | 04/04/1978 |
| 4053569 | Upgrading coal for coking purposes The invention relates to the upgrading of coal for coking purposes and improved cokes resulting from such upgrading. Pitch obtained as a by-product of pressure-gasification (Lurgi-process) is used as an additive either alone or blended with SRC. The addit... | 10/11/1977 |
| 4025057 | Equipment for making asphalt paving compositions Particulate emissions during production of asphalt concrete are controlled by contacting wet aggregate with an asphalt composition at or before introduction of the aggregate into a heated mixing and drying zone wherein the asphalt-aggregate mixture is mov... | 05/24/1977 |
| 4021393 | Method and composition for surfacing and repairing broken pavements with an elastomeric material having improved flexing properties at freezing temperatures without any significant loss of viscosity at high application temperatures A method and material is provided for surfacing and repairing broken pavements with an elastomeric paving material comprised of the reaction product between a paving grade asphalt and a non-oil resistant rubber having petroleum malthenes admixed with said... | 05/03/1977 |
| 4017327 | Process for producing mesophase pitch An improved process for producing pitch which is transformed, in part, to a liquid crystal or so-called "mesophase" state. According to the process, the mesophase content of the pitch is formed while agitating the pitch so as to produce a homogeneous emul... | 04/12/1977 |
| 4009308 | Process for producing refractories A process for producing refractories wherein an impregnant is filled into open pores of the refractories. The impregnant is the thermoplastic resinous material which is obtained by removing a light fraction having a boiling point of less than 200° C unde... | 02/22/1977 |
| 3986887 | Paving compositions Bituminous compositions suitable for road paving materials characterized by a Penetration Ratio of at least 25 and a minimum viscosity at 275° F. in the range from about 50 Saybolt Furol Seconds to about 120 Saybolt Furol Seconds, depending upon the pene... | 10/19/1976 |
| 3986889 | Method of producing a mixture of bitumen and subdivided solid mineral matter Method of producing a mixture of bitumen and subdivided solid mineral matter, comprising mixing pure bitumen with subdivided solid mineral matter containing moisture in at least such proportion as is picked up by the mineral matter from the atmosphere and... | 10/19/1976 |
| 3973971 | Method for preparing an improved creosote wood preservative from a coal tar creosote An improved creosote wood preservative that has a light color and that forms a non-sticky crud deposit is prepared from a coal tar creosote. The coal tar creosote is reacted with one or more of the following groups of neutral compounds: paraformaldehyde, ... | 08/10/1976 |
| 3971666 | Process for recycle of asphalt-aggregate compositions A process for recycling asphalt-aggregate compositions comprises heating pieces of the used composition to form a semi-fluid or viscous composition, detecting the composition's asphalt deficiency and adding the proper amount of make-up asphalt. The compos... | 07/27/1976 |
| 3956001 | Retarding skin formation on asphalt in hot storage Surface hardening or skin formation on asphalts stored at temperatures in excess of 170°C is inhibited by the addition of (a) dodecylphenoxypoly(ethyleneoxy)ethanol; (b) calcium petroleum sulfonate; (c) 2,6-ditertiarybutyl-p-phenol; or (d) 2,6-ditertiary... | 05/11/1976 |
| 3939004 | Asphalt paving compositions from positive spot asphalt fractions Asphalt fractions unsuitable for use in paving formulations because of their inhomogeneity (as reflected by their inability to pass the Oliensis Spot Test) can be used to make homogeneous asphaltic compositions (which pass the Oliensis Spot Test) by combi... | 02/17/1976 |
