Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5792735 | Lubricating oil compositions A lubricating oil composition suitable for use in low or medium speed diesel engines comprises a fuel oil with a residual oil content characterised in that the lubricating oil composition further comprises a hydrocarbyl-substituted phenate concentrate hav... | 08/11/1998 |
| 5780403 | Ash-free detergents their preparation and use in lubricating oil compositions A compound comprised of a moiety derived from an organic nitrogen-containing base and a calixarene moiety in which the hydroxyl substituent (or substituents) is (are) substituted by oligoether chains. Typically, the compounds are complexes of the formula ... | 07/14/1998 |
| 5734078 | Alkylation process A process for the production of an alkyl salicylic acid in which the alkyl substituent has at least 6 carbon atoms is disclosed, comprising reacting salicylic acid with an olefin having at least 6 carbon atoms at elevated temperature in the presence of su... | 03/31/1998 |
| 5719108 | Lubricating oil additives Dispersant/VI improvers for lubricating oil compositions are disclosed which comprise the reaction product of (a) a copolymer of octadecene-1 and maleic anhydride, the copolymer having a number average molecular weight from greater than 6300 to less than ... | 02/17/1998 |
| 5714443 | Sulphurised alkaline earth metal hydrocarbyl phenates, their production and use thereof An additive concentrate suitable for incorporation into a into a finished lubricating oil composition, the additive concentrate comprising: (a) a lubricating oil; (b) a lubricating oil soluble sulphurised alkaline earth metal hydrocarbyl phenate modified ... | 02/03/1998 |
| 5674821 | Detergent compositions A detergent concentrate composition suitable for incorporation into a finished lubricating oil comprises: (A) an additive concentrate comprising: (a) a lubricating oil, and (b) a lubricating oil soluble sulphurized or non-sulphurized alkaline earth metal hydro... | 10/07/1997 |
| 5670462 | Lubricating oil additives A process is disclosed which comprises reacting at elevated temperature (a) a copolymer of an olefin and a monomer having the structure ##STR1## wherein X and X1 are the same or different provided that at least one of X and X1 is suc... | 09/23/1997 |
| 5616543 | Lubricating oil compositions A lubricating oil composition suitable for use in low- or medium-speed diesel engines comprising a fuel oil with a residual oil content characterised in that the lubricating oil composition further comprises a "black paint" reducing amount of the product ... | 04/01/1997 |
| 5602084 | Detergent additives for lubricating oils, their preparation and use An additive concentrate preferably having a TBN greater than 300 suitable for incorporation in a finished lubricating oil composition, the additive concentrate comprising (a) a lubricating oil, and (b) a lubricating oil soluble detergent which is an overbased ... | 02/11/1997 |
| 5589445 | Overbased metal salts, their preparation and use An overbased metal salt of a hydrocarbyl-substituted sulphurised or non-sulphurised phenol, a calixarene having a substituent hydroxyl group or groups available for reaction with metal base or a linear phenol/formaldehyde resin wherein the metal moiety co... | 12/31/1996 |
| 5468404 | Lubricating oil additives, their preparation and use A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature a polyepoxide with a dispersant having at least one reactive nitrogen-containing moiety. Intermediates of the general formula IV... | 11/21/1995 |
| 5458790 | Alkaline earth metal hydrocarbyl salicylate concentrates, their preparation and use An additive concentrate having a TBN greater than 300 suitable for incorporation into a finished lubricating oil comprises: (I) a lubricating oil soluble overbased alkaline earth metal hydrocarbyl salicylate modified by reaction to incorporate (a) an alde... | 10/17/1995 |
| 5451331 | Process for the production of a lubricating oil additive concentrate A process for the production of a lubricating oil additive concentrate having a TBN greater than 300 comprises reacting at elevated temperature component (A) a defined salicylic acid derivative, component (B) an alkaline earth metal base added either in a single ... | 09/19/1995 |
| 5441652 | Process for the production of a lubricating oil additive concentrate A process for the production of a lubricating oil additive concentrate having a TBN greater than 300 which process comprises reacting component (A) a defined derivative of phenol component (B) an alkaline earth metal base added either in a single addition of i... | 08/15/1995 |
| 5439603 | Lubricating oil additives, their preparation and use A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature an epoxyacrylate with a dispersant having at least one reactive nitrogen-containing moiety. Intermediates of the general formula... | 08/08/1995 |
| 5437803 | Process for the production of a lubricating oil additive concentrate A process for the production of a lubricating oil additive concentrate which process comprises reacting at elevated temperature component (A) a defined acid or derivative thereof, component (B) a calcium base added either in a single addition or in a plurality... | 08/01/1995 |
| 5433871 | Process for the production of a lubricating oil additive concentrate A process for the production of a lubricating oil additive concentrate having a TBN greater than 300 which process comprises reacting at elevated temperature component (A) a defined mixture selected from defined sulphurized or non-sulphurized acids or cal... | 07/18/1995 |
| 5397484 | Alkaline earth metal sulphurised hydrocarbyl phenate-containing additive concentrate, process for its production and use thereof An additive concentrate composition having a TBN greater than 300 suitable for incorporation into a finished lubricating oil composition comprising: (I') a first alkaline earth metal sulphurised hydrocarbyl phenate, and (II') a lubricating oil, the first alkaline e... | 03/14/1995 |
| 5397489 | Lubricating oil additives, their preparation and use A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature a polyacrylate with a dispersant having at least one reactive nitrogen--containing moiety. Intermediates of the general formula ... | 03/14/1995 |
| 5384053 | Production of a lubricating oil additive concentrate A process for the production of a lubricating oil additive concentrate comprises reacting at elevated temperature component (A) a calcium hydrocarbyl-substituted sulphonate, component (B) an alkaline earth metal base added either in a single addition or in a p... | 01/24/1995 |
| 5356550 | Lubricating oil additives A process for producing a dispersant/VI improver for use in finished lubricating oil compositions comprises reacting in a normally liquid substantially inert organic solvent (a) a copolymer of an olefin and a monomer having the structure (I), wherein X an... | 10/18/1994 |
| 5330665 | Production of either an alkaline earth metal alkyl phenate or a sulphurised alkaline earth metal alkyl phenate Alkaline earth metal alkyl phenates are produced by reacting at elevated temperature, in the presence or absence of sulphur, an alkyl phenol with an alkaline earth metal base in the presence as solvent of either an alkylene or polyalkylene alkyl ether of ... | 07/19/1994 |
| 5314510 | Method for preventing the growth of aerobic fungi in aqueous hydrocarbons Aerobic fungal growth in hydrocarbons contaminated with water is prevented by addition thereto of an additive comprising boron and a hydrocarbyl-substituted succinimide in which the hydrocarbyl substituent is of a size sufficient to impart hydrocarbon sol... | 05/24/1994 |
| 5286873 | Succinimide derivatives and processes for their preparation A process for producing a lubricating oil dispersant additive comprises: step (1) reacting compound (A), wherein compound (A) is a hydrocarbyl-substituted or a substituted hydrocarbyl-substituted succinic acid or anhydride or ester thereof, with compound (B) o... | 02/15/1994 |
| 5281345 | Process for the preparation of a lubricating oil additive concentrate with an organic halide catalyst A process for the production of a lubricating oil additive concentrate comprises reacting at elevated temperature the following components: component (A) a defined acid component (B)--a calcium base added either in a single addition or in a plurality of additi... | 01/25/1994 |
| 5240625 | Lubricating oil additives A lubricating oil additive suitable as an extreme pressure/anti-wear additive comprises the product obtainable by reacting at elevated temperature a mixture comprising (i) sulphur, (ii) at least one C10 to C100 unsaturated carboxylic... | 08/31/1993 |
| 5234612 | Process for the production of ester derivatives useful as fuels and lubricating oil additives and novel esters produced thereby Ester derivatives useful as fuels and lubricating oil additives are prepared by the Michael addition of an alkyl acrylate to an amine to produce an intermediate ester, followed by an ester interchange with the intermediate ester to produce the final ester... | 08/10/1993 |
| 5205946 | Process for the production of overbased calixarates Non-sulphurized overbased metal salts of sulphur-free calixarenes having a substituent hydroxyl group or groups available for reaction with metal base and their preparation are claimed. The salts are useful as additives to lubricating oils by reason of th... | 04/27/1993 |
| 5186853 | Polyacrylate-modified bis-succinimide lubricant additives A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature a polyacrylate with a dispersant having at least one reactive nitrogen--containing moiety. Intermediatese of the general formula... | 02/16/1993 |
| 5162085 | Process for the production of an overbased phenate concentrate A process for the preparation of lubricating oil additive concentrate having a TBN greater than 300 comprises reacting at elevated temperature component (A) at least one compound which is A(i) an alkaline earth metal hydrocarbyl-substituted phenate, A(ii) a hy... | 11/10/1992 |
| 5145984 | Bis-succinimide derivatives A process for producing a lubricating oil dispersant additive comprises: step (1) reacting compound (A), wherein compound (A) is a hydrocarbyl-substituted or a substituted hydrocarbyl-substituted succinic acid or anhydride or ester thereof, with compound (B) o... | 09/08/1992 |
| 5131922 | Process for the production of oxidized polyisobutenes, their use in the production of additives and use of the additives Oxidized polyisobutenes, that is polyisobutenes containing ketonic and carboxylic acid carbonyl groups, are produced by passing through a column of the polyisobutene maintained at a temperature in the range from 140° to 200° C. and at atmospheric or ele... | 07/21/1992 |
| 5124484 | Process for the preparation of polyisobutene amines and fuel compositions comprising said polyisobutene amines A process for the preparation of a polyisobutene amine, in particularly a polyisobutene amine of formula (I): ##STR1## comprises reacting a carbonyl funtionalized polyisobutene [PIB]--(CO)R and an amine H2 NR1 and hydrogenating ... | 06/23/1992 |
| 5114601 | Overbased calixarates, compositions containing them and use as lubricating oil additives Non-sulphurized overbased metal salts of sulphur-free calixarenes having a substituent hydroxyl group or groups available for reaction with metal base are claimed. The salts are useful as additives to lubricating oils by reason of their acids neutralizati... | 05/19/1992 |
| 5090966 | Fuel composition containing an additive for reducing valve seat recession A fuel composition for use in internal combustion engines which composition comprises (A) a major amount of a fuel suitable for use in an internal combustion engine, preferably either a lead free or low-lead fuel for use in a spark ignition engine and (B)... | 02/25/1992 |
| 5086115 | Process for production of oxidized polyisobutenes, their use in the production of additives and use of the additives Oxidised polyisobutenes, that is polyisobutenes containing ketonic and carboxylic acid carbonyl groups, are produced by passing through a column of the polyisobutene maintained at a temperature in the range from 140° to 200° C. and at atmospheric or ele... | 02/04/1992 |
| 5079307 | High molecular weight polyamide production from dicarboxy terminated polyamide prepolymer This invention relates to a process for producing polyamides of high molecular weight from dicarboxy terminated prepolymers of relatively lower molecular weight by further polymerization in an extruder in the presence of an additive comprising a diamine. ... | 01/07/1992 |
| 5075020 | Lubricating composition containing anti-wear/extreme pressure additives Compounds suitable for use as extreme pressure (EP)/anti-wear (AW) agents in lubricating oil compositions, which compounds have the formula: R1 --S--X--S--S--R (I) wherein R1 is either R--S-- or hydrogen, R i... | 12/24/1991 |
| 5028666 | Process for the production of oxidized polyisobutenes, there use in the production of additives and use of the additives Oxidized polyisobutenes, that is polyisobutenes containing ketonic and carboxylic acid carbonyl groups, are produced by passing through a column of the polyisobutene maintained at a temperature in the range from 140° to 200° C. and at atmospheric or ele... | 07/02/1991 |
