Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 4479879 | Process for dewatering sludges A process for dewatering aqueous sludges of organic nature by adding to the sludge a cationic organic flocculant to effect a first stage agitation of vigorous intensity, and then adding thereto an anionic organic flocculant to perform a second stage agita... | 10/30/1984 |
| 4382864 | Process for dewatering sludges A process for dewatering sludges, which comprises performing a first stage agitation of the sludge to be dewatered during addition of a first high molecular weight flocculant developing in an aqueous solution an electric charge in polarity opposite to tha... | 05/10/1983 |
| 4221661 | Method of dehydrating organic sludge A method of dehydrating an organic sludge, which comprises adjusting the pH value of a sludge having a solids concentration in the range of from 0.5 to 8% by weight, to a pH of 5 or less, heating the thus adjusted sludge, mixing with the sludge an oxidize... | 09/09/1980 |
| 4209398 | Water treating process A water treating agent which comprises a specific polymer containing a structural unit that is derived from a monomer having an ethylenically unsaturated bond and has one or more carboxyl radicals, at least a part of said carboxyl radicals being modified,... | 06/24/1980 |
| 4186089 | Method and apparatus for dewatering of sludgy substance Within a chamber having an inlet for admitting a sludgy substance for dewatering and an outlet for discharging the dewatered cake of the sludgy substance, there are disposed two laterally opposed filtration trains each consisting of a plurality of rotary ... | 01/29/1980 |
| 4102786 | Method for cleaning of filter device Disclosed herein is a method for cleaning a filter device packed with a bed of filtering grains, which cleaning is effected whenever the pressure loss in the filter device has increased to a prescribed level by first discharging the filtering grains throu... | 07/25/1978 |
| 4042500 | Fluidized-bed type multistage solid-liquid contact apparatus Disclosed are improvements in and relating to a fluidized-bed type multistage solid-liquid contact apparatus which comprises a contact column incorporating therein a multiplicity of a spaced and horizontal support plates each carrying thereon a fluidized ... | 08/16/1977 |
| 4036751 | Method of treating water containing chromate A method of treating water containing chromate by bringing the water-to-be-treated into contact with ion-exchange resins, which comprises: passing the water-to-be-treated through a bed of weakly acidic cation exchange resin in H-form at first; subsequentl... | 07/19/1977 |
| 4022639 | Method for removing carbon scale A method for removing carbon scale, comprising permeating carbonate or bicarbonate into the carbon scale formed on a metal surface of a heating furnace, reactor or the like in a chemical plant by bringing the former into contact with the latter and decomp... | 05/10/1977 |
| 3998739 | Apparatus for filtration An apparatus for filtration comprises a filtration column having an inner cylindrical compartment and an outer jacket compartment disposed in such a relationship that the outer jacket compartment encloses the inner cylindrical compartment and the space in... | 12/21/1976 |
