Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 3982095 | Respiratory humidifier A respiratory humidifier has a base with a thermally controlled heater therein effective to heat a first transfer surface on the top of the base. Removably pressed against the first transfer surface is a second transfer surface forming the bottom of a con... | 09/21/1976 |
| 3978176 | Sparger A sparger useful for producing bubbles of uniform size in liquids is formed from a body comprised of a cured, thermosetting resin matrix enclosing spherical particles of substantially uniform size and containing numerous interconnecting passageways formed... | 08/31/1976 |
| 3970731 | Bubble-generating aerator A bubble generating aerator comprising a disc-like or tubular aerating element made of a sintered open-pore plastics material, the element being submerged in a surrounding liquid and connected to a pressure gas source for supplying gas into the element an... | 07/20/1976 |
| 3960164 | Device for mixing gases with liquids A device for mixing gases with liquids is disclosed, which is characterized by the use of gas inlet and vent valves of unique construction and highly efficient in operation, and the use of a unique toggle mechanism for opening and closing said valves whic... | 06/01/1976 |
| 3958945 | Sparging device A device for sparging carbon dioxide from an acidified aqueous stream for use in a system for quantitatively determining the organic carbon content of the stream has a body with vertically extending cavities formed therethrough and passageways which conne... | 05/25/1976 |
| 3958964 | Apparatus for bringing gases and liquids into contact The invention concerns a column for bringing gases or vapors and liquids into contact which uses a plurality of plates made from a highly porous, open-pore, sintered material. According to the invention, the gas and the liquid are conducted in this column... | 05/25/1976 |
| 3957442 | Apparatus for the production of glycerol dichlorohydrin Glycerol dichlorohydrin is prepared by dissolving allyl chloride vapor in an upwardly flowing aqueous stream, dissolving chlorine gas in a separate second upwardly flowing aqueous stream to form a hypochlorous acid solution, mixing the two streams and flo... | 05/18/1976 |
| 3957466 | Gas washing device An improved gas washing device wherein gases to be cleaned are passed into the device through the gas inlet. A tubular connection between the gas inlet and a bell chambers which is provided with a top slotted plate. Wire mesh disposed over the bell chambe... | 05/18/1976 |
| 3956432 | Aeration technology The easily serviced aeration apparatus of the invention includes a central base structure comprising a source of air under pressure, a plurality of lateral passages extending radially outward from the source, a diffuser hanger at the outward end of each l... | 05/11/1976 |
| 3953553 | Sewage treatment aeration systems An aeration system for a sewage treatment plant, including headers having diffuser connectors longitudinally spaced along the header, the connectors having nipples formed thereon which are welded to nipples formed on the header.... | 04/27/1976 |
| 3953554 | Diffuser for aeration systems There is provided a simple gas diffusing apparatus composed of a top member having gas permeable perforations, a bottom member including a plurality of larger openings for removal of solid and semi-solid accretions, a gas inlet nipple for introduction of ... | 04/27/1976 |
| 3941862 | Gas diffusing assembly An assembly for diffusing gas in a humidifier comprises a base plate having a wall extending around its periphery, a diffuser sheet comprising a substantially gas impermeable membrane having a plurality of perforations and a member for directing gas to be... | 03/02/1976 |
