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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 4861939 | Process for removing arsine from light olefin containing hydrocarbon feedstocks The present invention relates to a process for removing arsine from a light olefin to containing hydrocarbon feedstock, said process comprising the steps of (a) passing said feedstock over an absorbent material comprising nickel deposited on a support mat... | 08/29/1989 |
| 4830759 | Dispersant compositions for treating oil slicks Compositions for dispersing oil slicks on water comprising a solution of surface-active agents in a mixture of water and hydrocarbon solvent. The surface-active agents are a mixture of emulsifying agents and a lower amount of wetting agent. The mixture of... | 05/16/1989 |
| 4830735 | Process for removing carbonyl-sulfide from liquid hydrocarbon feedstocks The present invention relates to a process for removing carbonyl sulfide from a liquid hydrocarbon feedstock, said process comprising the steps of (a) passing said hydrocarbon feedstock over an absorbent material comprising nickel deposited on a support m... | 05/16/1989 |
| 4831200 | Process for the selective hydrogenation of alkynes Alkynes are selectively hydrogenated in alkene rich hydrocarbon feeds, such as 1,3-butadiene-rich C4 cuts, by passing the hydrocarbon feed at least partially in liquid phase over a palladium-based catalyst in the presence of hydrogen, preferabl... | 05/16/1989 |
| 4824438 | Process for producing smokeless, cured fuel briquettes Green briquettes made from particulate carbonaceous material and lignosulfonate as a binder are cured in an oven in the presence of circulating gases containing a high percentage of oxygen and superheated steam. The sulfur derived from the binder is oxidi... | 04/25/1989 |
| 4794096 | Hafnium metallocene catalyst for the polymerization of olefins The present invention provides a catalyst system for the polymerization and copolymerization of olefins with the system comprising a chiral, stereorigid hafnium metallocene catalyst in combination with an aluminum compound. The aluminum compound is prefer... | 12/27/1988 |
| 4781906 | Crystalline silicas A novel crystalline silica composition having a silica to alumina atomic ratio not lower than 80 and having a certain specific X-ray diffraction pattern after calcination in air for at least 3 hours at a temperature of at least 500° C.... | 11/01/1988 |
| 4777210 | Continuous production of high impact polystyrene The invention relates to a continuous flow process for producing polystyrene having discrete particles of rubber included therein. The process utilizes a pre-inversion reactor, in which a solution of styrene, polystyrene and rubber are mixed prior to bein... | 10/11/1988 |
| 4772456 | Process for preparing crystalline silicas Disclosed is a process for preparing crystalline silicas having the monoclinic symmetry which comprises the step of calcining in air for at least 3 hours at a temperature of at least 500° C. a crystalline silica of the silicalite type having a silica to ... | 09/20/1988 |
| 4770798 | Lubricating and anti-corrosion compositions Compositions for treating metal, e.g., steel sheets which act as compositions lubricants during stamping of the sheets and protect the sheets against rust during their storage and before and after the stamping thereof. The compositions comprise a mineral ... | 09/13/1988 |
| 4770939 | PVdF-based powder coatings A process for preparing pigmented PVdF-based powder coating products is disclosed, which comprises the steps of (i) mixing PVdF resin with a compatible thermoplastic resin, preferably PMMA in a weight ratio of about 80:20 to 40:60, with pigments, and with... | 09/13/1988 |
| 4767735 | Catalyst pretreatment process A process for pretreating a Ziegler-type catalyst for use in olefin polymerization reactions. An olefin monomer is aded to a fluid carrier stream containing a Ziegler-type catalyst. The carrier stream containing the monomer and the catalyst is passed thro... | 08/30/1988 |
| 4761439 | Anti-fouling paint compositions A paint composition comprising a film-forming polymer, and at least one sparingly soluble metalliferous pigment, and wherein said polymer comprises (A) from 20 to 45 wt. % of monomer units of at least one triorganotin salt of an olefinically unsaturated c... | 08/02/1988 |
| 4748291 | Catalytic treatment process A catalytic treatment process is disclosed, which is carried out under pressure, in the presence of water, and with a molecular sieve catalyst which is TEA-silicate or silicalite previously stabilized by halogenation. This process may be applied to the ar... | 05/31/1988 |
| 4745065 | Genes conferring on yeasts a resistance to herbicides Disclosed is an autoreplicative plasmid containing DNA which encodes herbicide resistance, such that the plasmid is capable of transforming a yeast cell to become resistant to one or more organic herbicide growth inhibitors. Also disclosed is a process fo... | 05/17/1988 |
| 4743360 | Process for removing basic nitrogen compounds from gas oils A process for removing the basic nitrogen compounds from gas oils comprises treating the gas oils with a homogeneous solvent mixture comprising a diluted aqueous acid solution and an alcohol having from 1 to 6 carbon atoms, the volume ratio of alcohol to ... | 05/10/1988 |
| 4728671 | Process for producing alcohols The present invention relates to a process for producing alcohols comprising hydrogenating compounds selected from the group consisting of acids, esters and aldehydes under sufficient hydrogen pressure and temperature in the presence of a catalyst compris... | 03/01/1988 |
| 4726948 | Anti-bacterial feedstuff compositions and process for preparing the same An anti-bacterial composition capable of being activated in the gastro-intestinal tract of mammals is provided. Said composition comprises an effective amount of lactoferrin and lactoperoxidase, and an activating system present in sufficient amounts to ac... | 02/23/1988 |
| 4724070 | Process for the decomposition of polyhalogenated aromatic compounds The decomposition of polyhalogenated aromatic compounds, such as polychlorinated biphenyls (PCB), is carried out under an inert atmosphere using a reagent comprising a polyglycol partially neutralized with sodium, and a weakly basic compound.... | 02/09/1988 |
| 4723050 | Xylene isomerization process Process for the isomerization of a xylene feedstock employing a silicalite catalyst. A xylene feedstock containing a mixture of xylene isomers and ethylbenzene is passed to a reaction zone containing the silicalite catalyst. Para-xylene is present in the ... | 02/02/1988 |
| 4723049 | Toluene disproportionation process A process for the disproportionation of a toluene containing feedstock over an aluminum deficient mordenite catalyst having a silica/alumina mole ratio of at least 30. The feedstock and hydrogen co-feed are supplied to a reaction zone containing the morde... | 02/02/1988 |
| 4723051 | Xylene isomerization process Process for the isomerization of xylene feedstock employing an aluminum-deficient mordenite catalyst. The xylene feedstock is passed into a reaction zone and in contact with a mordenite catalyst having a silica/alumina mole ratio of at least 30. The xylen... | 02/02/1988 |
| 4713271 | Foamed polymer tubing Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to as m... | 12/15/1987 |
| 4711728 | Treating spent filter media A process for removing sorbed lubricating oil additives from siliceous filter material is provided. The process comprises forming a slurry of the additive-laden siliceous filter material and an aromatic solvent. Water is added to the slurry prior to separ... | 12/08/1987 |
| 4697961 | Process for consolidating soils Soils are consolidated with formation of a top layer having compressive strength by treating soil particles with cement, alkali silicate and a dialdehyde, at ambient temperature.... | 10/06/1987 |
| 4677171 | Process for producing styrenic/alkenylnitrile copolymers Disclosed is a process and apparatus for the continuous mass polymerization of styrenic and alkenylnitrile monomers. The process comprises the steps of continuously introducing a feed comprising a predetermined ratio of styrenic and alkenylnitrile monomer... | 06/30/1987 |
| 4673586 | Method for making plastic containers having decreased gas permeability The apparatus for making plastic containers having decreased gas permeability includes a chamber, an ionizing source located in the chamber for ionizing a material to be deposited on the containers, and a screen located between the ionizing source and the... | 06/16/1987 |
| 4667620 | Method and apparatus for making plastic containers having decreased gas permeability Apparatus for producing open ended plastic containers having decreased gas permeability that includes a vacuum chamber and a pump for regulating the pressure therein, an ionization source mounted in the chamber proximate the container's open end and a con... | 05/26/1987 |
| 4668175 | Apparatus for forming deep containers Apparatus for forming deep containers from a thermoplastic material including a first mold portion having a cavity therein defining the side and bottom configuration of the container and a second mold portion having a plunger provided for reciprocation th... | 05/26/1987 |
| 4667018 | Process for the purification of proteins using acidic polysaccharide gels A process for the purification of proteins from a fluid medium wherein said proteins have an isoelectric pH higher than the pH of said fluid medium, said process comprising passing the liquid medium over acidic polysaccharide gel particles of at least 0.5... | 05/19/1987 |
| 4665258 | Toluene disproportionation process Process for the disproportionation of toluene employing an aluminum deficient mordenite catalyst. A toluene containing feedstock is supplied to a reaction zone containing a mordenite catalyst having a silica/alumina mole ratio of at least 30. The toluene ... | 05/12/1987 |
| 4657858 | Cloning vectors comprising a restriction site bank and the construction thereof Vectors are disclosed for cloning any foreign DNA in prokaryotic and eukaryotic organisms, which vectors comprise a restriction site bank containing a large number of unique restriction sites. The disclosed vectors permit the cloning of large DNA fragment... | 04/14/1987 |
| 4650816 | Expanded polypropylene and articles thereof Disclosed are rigid materials such as sheets, boards or tubes made of expanded polypropylene, which have a uniform specific gravity d of from about 4.1×10-6 to about 8.1×10-6 Newton/mm3, a crystallization temperature of ... | 03/17/1987 |
| 4638015 | Expanded polypropylene films Disclosed are films made of expanded polypropylene, which have a uniform specific gravity d of from about 4.25×10-6 to about 6.50×10-6 Newton/mm3, a crystallization temperature of from about 115° C. to about 135° C. an... | 01/20/1987 |
| 4636349 | Process for manufacturing thermoplastic containers A process for forming hollow articles from a thermoplastic polymer sheet material. Polymer sheet material is heated to a forming temperature and clamp between a ported mold plug and a jacketed mold cavity. The mold plug is moved into the mold cavity to st... | 01/13/1987 |
| 4623431 | Polymerization inhibitor for vinyl aromatic compounds A process for the distillation of readily polymerizable vinyl aromatic compounds which comprises subjecting said compounds to distillation conditions in the presence of oxygen and an effective amount of asphaltene as a polymerization inhibitor.... | 11/18/1986 |
| 4623430 | Polymerization inhibitor for vinyl aromatic compounds A process for the distillation of readily polymerizable vinyl aromatic compounds which comprises subjecting said compounds to distillation conditions in the presence of an effective amount of a pretreated polymerization inhibitor selected from the group c... | 11/18/1986 |
| 4623468 | Method for treating oil slicks A method for reducing oil slick on seawater comprising applying to the oil slick a dispersing compositions containing at least one surface-active agent, at least one solvent, and a nitrogen-containing compound which is a nutrient for the micro-organisms w... | 11/18/1986 |
| 4621678 | Heat exchanger apparatus for extruding thermoplastic compositions Disclosed is heat exchange apparatus for controlling the temperature of a resin after leaving an extruder and prior to extrusion through a die in an extrusion process, comprising a heat exchanger having an inlet and outlet for an extruded heat-plastified ... | 11/11/1986 |
| 4613724 | Process for removing carbonyl-sulfide from liquid hydrocarbon feedstocks The present invention relates to a process for removing carbonyl sulfide from a liquid olefinic hydrocarbon feedstock comprising (a) passing said hydrocarbon feedstock over an absorbent material comprising zinc oxide and a promoter selected from the group... | 09/23/1986 |
