Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 5533669 | Heat transfer apparatus A heat transfer apparatus is provided with a refrigerant heater, a single container disposed above the refrigerant heater, and the radiator spaced from the container. The container accommodates a partitioning plate for separating the inside of the contain... | 07/09/1996 |
| 4880051 | Piping apparatus for melting snow and ice A piping apparatus for melting snow and ice, wherein a large number of heat radiation pipes are arranged below or above a surface from which snow or ice is to be melted and removed. One of the ends of each of the heat radiation pipes is communicated with ... | 11/14/1989 |
| 4844020 | Waste heat recovery system There is disclosed a heat recovery system for recovering the heat potential of a gaseous stream having a temperature of from 500° to 2500° F. utilizing a primary heat exchanger through which is passed a heat transfer salt mixture in indirect heat transf... | 07/04/1989 |
| 4815526 | Central space heating apparatus A central space heating apparatus comprises a furnace having a chamber adapted to receive and contain a gas and a source a heat for heating the gas in the chamber, conduits connected in closed circuit to the furnace chamber for conducting the gas from the... | 03/28/1989 |
| 4662433 | Individual comfort control device The instant invention is a major energy saver in the form of a blanket which allows personal heat control, particularly cooling. More specifically, the blanket is provided with internal ducts through which a stable foam is circulated as a cooling fluid in... | 05/05/1987 |
| 4436079 | Fireplace for heating indoor spaces and water for sanitary use An improved fireplace for heating indoor spaces and sanitary water comprises a hearth whereon wood can be burned such as to define a heat source, and, adjacent the hearth, an air circulating space and a sanitary hot water generating heat exchanger.... | 03/13/1984 |
| 4123219 | Chemical storage of radiant energy A method for the chemical storage of radiant energy in which substituted naphthalenes undergo photochemical dimerization by exposure to radiant energy to form 1,2,2a,7,8,12b-hexahydro-1,8,2,7-ethanedihylidenedibenzo[a,e]cyclobuta[c]c yclooctenes, whic... | 10/31/1978 |
| 4060194 | Heating system and element therefor A closed heating system in which a silicone fluid having a high specific heat is pumped through an element formed of tetrafluoroethylene. The element is provided with a plurality of small openings through which the fluid is forced. The fluid is heated and... | 11/29/1977 |
| 3994675 | Chemical storage of radiant energy A system for the chemical storage of radiant energy in which either: A. 1,8-diaryl-1a,2,7,7a-tetrahydro-1,2,7-metheno-1H-cyclopropa[b]naphthalenes (1) are converted on heating to 1,2-diaryl-2a,8b-dihydrocyclobuta[a]naphthalenes (2) or 8,9-diaryl-benz... | 11/30/1976 |
| 3964416 | Boiler reactor 1. A steam boiler-reactor comprising; A. a cylindrical casing having closures at opposite ends thereof, B. a steam generating tube, formed in a helical coil, disposed adjacent the nner surface of said casing and extending substantially between its opposite ends... | 06/22/1976 |
