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Browse by Date |
| Patent Number |
Title Of Patent |
Date Issued |
| 4257921 |
Catalyst for the oxidation of butene |
Mar. 24, 1981 |
| 4257920 |
Catalyst containing a noble metal of the VIIIth group, copper oxide, zinc oxide and a rare earth... |
Mar. 24, 1981 |
| 4257919 |
Method of transferring a passivating agent to or from a cracking catalyst |
Mar. 24, 1981 |
| 4257918 |
Catalyst mixture for the catalytic reduction of nitrogen oxides in gaseous mixtures |
Mar. 24, 1981 |
| 4257917 |
Catalyst for preparation of soluble poly(dichlorophosphazenes) |
Mar. 24, 1981 |
| 4257916 |
Process for the preparation of a functionalized solid product |
Mar. 24, 1981 |
| 4257915 |
Photopolymer initiator system containing a semiconductor, a reducing agent and an oxidizing agen... |
Mar. 24, 1981 |
| 4257914 |
Method for the regeneration of spent molten zinc chloride |
Mar. 24, 1981 |
| 4257913 |
Stable manganese salt solutions and a process for their production |
Mar. 24, 1981 |
| 4257912 |
Concrete encapsulation for spent nuclear fuel storage |
Mar. 24, 1981 |
| 4257911 |
Liquid crystal materials |
Mar. 24, 1981 |
| 4257910 |
Liquid crystal of diester type exhibiting a smectic phase, with low frequency of dielectric isot... |
Mar. 24, 1981 |
| 4257909 |
Non-aromatic hydrocarbon containing cleaning fluid |
Mar. 24, 1981 |
| 4257908 |
Laundry detergent in gel form |
Mar. 24, 1981 |
| 4257907 |
Disinfectant cleaning compositions |
Mar. 24, 1981 |
| 4257906 |
Method of protecting nitrilotriacetate salts |
Mar. 24, 1981 |
| 4257905 |
Gaseous insulators for high voltage electrical equipment |
Mar. 24, 1981 |
| 4257904 |
Dielectric glass coating composition containing polymethylmethacrylate fugative binder |
Mar. 24, 1981 |
| 4257903 |
Drilling fluid containing crosslinked polysaccharide derivative |
Mar. 24, 1981 |
| 4257902 |
Water-based industrial fluids |
Mar. 24, 1981 |
| 4257901 |
Cleanable filter and method of cleaning same |
Mar. 24, 1981 |
| 4257900 |
Method of clarifying liquids |
Mar. 24, 1981 |
| 4257899 |
Method for removing chloropicrin from an aqueous medium |
Mar. 24, 1981 |
| 4257898 |
Method of processing waste sludge from wet phosphoric acid purification facilities |
Mar. 24, 1981 |
| 4257897 |
Process for reabsorption and retention of phosphorous by activated biomass |
Mar. 24, 1981 |
| 4257896 |
Countercurrent liquid-solid contacting apparatus |
Mar. 24, 1981 |
| 4257895 |
Low gravity crude oil and water separator |
Mar. 24, 1981 |
| 4257894 |
Filter core extender and seal |
Mar. 24, 1981 |
| 4257893 |
Portable purification device for use in aquariums |
Mar. 24, 1981 |
| 4257892 |
Drain cover |
Mar. 24, 1981 |
| 4257891 |
Dual disc pressure release valve |
Mar. 24, 1981 |
| 4257890 |
Fuel-water separator |
Mar. 24, 1981 |
| 4257889 |
Oil skimming apparatus |
Mar. 24, 1981 |
| 4257888 |
Cartridge filter |
Mar. 24, 1981 |
| 4257887 |
Circuit and apparatus for controlling a water softener |
Mar. 24, 1981 |
| 4257886 |
Apparatus for the separation of blood components |
Mar. 24, 1981 |
| 4257885 |
Novel zeolite compositions and processes for preparing and using same |
Mar. 24, 1981 |
| 4257884 |
Chromatography |
Mar. 24, 1981 |
| 4257883 |
Parts sorting mechanism |
Mar. 24, 1981 |
| 4257882 |
Method of pre-concentrating heterogeneous mineral mixtures |
Mar. 24, 1981 |
| 4257881 |
Process for beneficiating oxide ores |
Mar. 24, 1981 |
| 4257880 |
Centrifugal air classifying apparatus |
Mar. 24, 1981 |
| 4257879 |
Process for dewatering coal slurries |
Mar. 24, 1981 |
| 4257878 |
Beneficiation process for oil shale |
Mar. 24, 1981 |
| 4257877 |
Selective hydrogenation process |
Mar. 24, 1981 |
| 4257876 |
Passivation of metals contaminating a cracking catalyst with trihydrocarbylantimony oxide and pr... |
Mar. 24, 1981 |
| 4257875 |
Fluid catalytic cracking process |
Mar. 24, 1981 |
| 4257874 |
Petroleum refinery processes using catalyst of aluminosilicate sols and powders |
Mar. 24, 1981 |
| 4257873 |
Hydrocracking with molten zinc chloride catalyst containing 2-12% ferrous chloride |
Mar. 24, 1981 |
| 4257872 |
Low pressure hydrocracking of refractory feed |
Mar. 24, 1981 |
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