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| Number | Title | Issue Date |
| 4697018 | 9-julolidinyl derivatives and process of preparing them The invention provides processes for the preparation of both known and novel [bis(substituted-aryl) (indolyl)]methanes and [(substituted-aryl) (heteryl) (indolyl)]methanes, useful as color formers, particularly in carbonless duplicating and thermal markin... | 09/29/1987 |
| 4675389 | (2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulfonic acids Physiologically acceptable cation salts of (2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulfonic acids useful as blue-red colorants for textile fabrics, cellulosic fibers and edible compositions are prepared by diazotizing 2-alkoxy-4-s... | 06/23/1987 |
| 4661605 | 3-(ether and thioether)-3-(indolyl)-phthalides This invention relates to 3-aryl or heteroaryl-3-alkoxy, phenoxy-, alkylthio- or phenylthiophthalides useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared by the interaction of 2-(disubstituted am... | 04/28/1987 |
| 4652643 | 3-amido-7-disubstituted amino-10-carbonylphenothiazines 3-(N--R2 --N-Acylamino)-7-(N--R3 --N--R4 -amino)-10-acylphenothiazines and phenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 3-(N--... | 03/24/1987 |
| 4639750 | Fluoran compounds and marking systems 2- And/or 6-pyridylethylamino-substituted fluorans useful as color formers, particularly in pressure-sensitive carbonless duplicating systems and thermal-responsive marking systems are prepared by the interaction of (pyridylethylaminophenyl)carbonylbenzoi... | 01/27/1987 |
| 4632783 | Triphenylmethane dyestuffs A method for sanitizing flush toilets wherein a sanitizing agent and a triphenylmethane dyestuff are dispensed separately from a dual dispensing means into the toilet flush water. The dyestuff is resistant to attack by the sanitizing agent and therefore p... | 12/30/1986 |
| 4604462 | 4-substituted amido-8-disubstituted aminoimidazophenoxazines 4-(N-Acylamino)-8-(N-R1 -N-R2 -amino)imidazophenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 1,3-diamino-7-(N-R1 -N-R2 ... | 08/05/1986 |
| 4604461 | 5-substituted-9-disubstituted amino-12-substituted carbonylbenzo[a]phenoxazines 5-[N-(RCO)-N-R1 -amino] or (RCOO)-9-(N-R2 -N-R3 -amino)-12-(RCO)benzo[a]phenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 5-(N-R | 08/05/1986 |
| 4604458 | 3-substituted carbonyloxy-7-disubstituted amino-10-substituted carbonylphenothiazines 3-(R-Carbonyloxy)-7-(N-R1 -N-R2 -amino)-10-(RCO)-phenothiazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 7-(N-R1 -N-R2 -amin... | 08/05/1986 |
| 4595768 | 3-(substituted phenyl)phthalides Process comprises the combination of the three steps of condensing 3-N(R)2 -4-X-benzoic acid with an aromatic or heterocyclic aldehyde, Y-CHO, under acidic conditions to produce 3-Y-5-X-6-N(R)2 phthalide (II), condensing said phthali... | 06/17/1986 |
| 4595536 | Triphenylmethane dyestuff A method for sanitizing flush toilets wherein a sanitizing agent and a triphenylmethane dyestuff are dispensed into the toilet flush water. The dyestuff is resistant to attack by the sanitizing and therefore provides an aesthetically pleasing color to the... | 06/17/1986 |
| 4570171 | Electrochromic marking systems 5-[N-(RCO)-N-R1 -amino] or (RCOO)-9-(N-R2 -N-R3 -amino)-12-(RCO)benzo[a]phenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 5-(N-R | 02/11/1986 |
| 4561001 | Electrochromic marking systems 3-(N-R2 -N-Acylamino)-7-(N-R3 -N-R4 -amino)-10-acylphenothiazines and phenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 3-(N-R... | 12/24/1985 |
| 4558137 | Bis phenyl (2 carboxylic acid or ester indol-3-yl)methanes The invention provides processes for the preparation of both known and novel [bis(substituted-aryl) (indolyl)]methanes and [(substituted-aryl) (heteryl) (indolyl)]methanes, useful as color formers, particularly in carbonless duplicating and thermal markin... | 12/10/1985 |
| 4524049 | Process for concurrent steam generation and metal recovery Vanadium and nickel are recovered from fluid coke or fly ash concurrently with cogeneration of steam by a wet oxidation process at 500°-650° F. and elevated pressure, with a leaching pH of approximately 0.3 maintained by generation of sulfuric acid in s... | 06/18/1985 |
| 4517906 | Method and apparatus for controlling auxiliary fuel addition to a pyrolysis furnace A two-stage starved air furnace system is controlled to simultaneously achieve desired temperatures and percent stoichiometric air operation in the primary stage by modulating transformation relay functions acting upon measured temperature deviations to c... | 05/21/1985 |
| 4505210 | Multiple hearth furnace chamber A multiple hearth furnace chamber where each arched or conical hearth is independently supported by the outer metal shell. An expansion joint below each hearth allows for vertical movement of the interior refractory wall panels without significant vertica... | 03/19/1985 |
| 4474121 | Furnace control method A method for controlling two-stage combustion furnaces having a first stage operated with sub-stoichiometric airflow and a second stage operated with excess air, whereby the first stage airflow is controlled such that the ratio of first stage airflow to t... | 10/02/1984 |
| 4461743 | Oxygen injection nozzle for wet oxidation reactors An apparatus for injecting a mixture of pure oxygen or oxygen-enriched air (at least 25 percent oxygen) and purge water into a wet oxidation reactor operating at elevated temperature and pressure. An annular space between the oxygen carrying pipe and a se... | 07/24/1984 |
| 4407717 | Wastewater treatment process A process for treating wastewaters with a powdered adsorbent and one or more fixed media filters, wherein biological oxidation occurs. The adsorbent is optionally regenerated and reused. In multistage operation, adsorbent is contacted with wastewater in s... | 10/04/1983 |
| 4402758 | Method for removing scale from porous diffusion tiles A method for cleaning porous diffusion tiles used in systems for distributing oxygen or oxygen containing gas in water bodies is disclosed. The build-up of scale, which blocks the pores in such diffusion tiles, is removed by (1) purging the oxygen distrib... | 09/06/1983 |
| 4395339 | Method of operating pure oxygen wet oxidation systems A method comprising operating steps required for safely operating wet oxidation reactors in which combustible substances are oxidized at elevated temperatures and pressures using pure oxygen. The steps satisfy the criteria that a potential of oxidation is... | 07/26/1983 |
| 4387084 | Process for treating thiosulfate containing liquors A process for treating thiosulfate containing liquors such as coke oven gas scrubbing liquors by first adding acid, preferably sulfuric acid, to convert thiosulfate to elemental sulfur and bisulfite, separating and removing the elemental sulfur, and subje... | 06/07/1983 |
| 4384959 | Wet oxidation process utilizing dilution of oxygen A continuous process for wet oxidation of aqueous liquor containing combustible matter using oxygen or oxygen enriched gas. An inert diluent gas is injected into the aqueous liquor or reactor off-gas such that oxygen in the gas phase is diluted by the sum... | 05/24/1983 |
| 4372940 | Process and apparatus for treatment of thiosulfate containing liquors A process and apparatus for treating thiosulfate containing liquors such as coke oven gas scrubbing liquors in two stages of wet oxidation with intermediate removal of elemental sulfur. Mild oxidation conditions in the first stage results in conversion of... | 02/08/1983 |
| 4357953 | Apparatus for slurrying powdered solids An apparatus for introducing powdered solids into a liquid stream at a controlled rate to form a slurry. Solids are metered to an eductor where they are educted into the liquid stream. An automatic cycle timer-controller purges eductor, hopper and piping ... | 11/09/1982 |
| 4350599 | Process for treatment of caustic waste liquors An improvement in the wet oxidation of caustic waste liquors wherein carbon dioxide produced in the wet oxidation is recycled to raw caustic waste to neutralize the latter, thereby reducing the corrosive nature of the waste.... | 09/21/1982 |
| 4330038 | Oil reclamation process A process for enhanced oil recovery by gas injection into oil-bearing formations which comprises wet oxidizing combustible carbonaceous materials with oxygen, air or a mixture of oxygen and air to obtain a gas comprising a mixture of water vapor and carbo... | 05/18/1982 |
| 4312761 | Treatment of clay slimes A process for dewatering slimes produced in mining and mineral processing operations whereby wet oxidation at 150°-320° C. renders the solids rapidly settleable. Sufficient oxygen is supplied to meet or exceed oxygen demand. Inorganic solids in the oxid... | 01/26/1982 |
