1
William Edward Jennings, Dennis Palmer Manchester, Edward E King, David A Barclay: Microwave apparatus for controlling power levels in individual multiple cells. CEM Corporation, Philip S Summa Patent Attorney, August 18, 1998: US05796080 (62 worldwide citation)

A microwave processing system is disclosed. The system is particularly useful for concurrently controlling a plurality of chemical reactions from a single microwave source. The system comprises a source that produces electromagnetic radiation in the microwave range; a waveguide in communication with ...


2
Wyatt P Hargett, Sara E Littau: Use of a ventable rupture diaphragm-protected container for heating contained materials by microwave radiation. CEM Corporation, Raymond F Kramer, November 29, 1994: US05369034 (54 worldwide citation)

A ventable container for materials to be heated (preferably digested) by microwave radiation includes a movable rupture diaphragm in a venting passageway in a closure or cover for such container. Such diaphragm is tightenable into place so that the container is sealed and in such sealed state is pro ...


3
Wyatt P Hargett, Sara E Littau: Ventable rupture diaphragm-protected container for heating contained materials by microwave radiation. CEM Corporation, Raymond F Kramer, July 27, 1993: US05230865 (44 worldwide citation)

A ventable container for materials to be heated (preferably digested) by microwave radiation includes a movable rupture diaphragm in a venting passageway in a closure or cover for such container. Such diaphragm is tightenable into place so that the container is sealed and in such sealed state is pro ...


4
Michael J Collins: Analytical apparatus for determining volatiles, solids, and solvent extractables in a sample. CEM Corporation, H M Adrian Jr, November 19, 1985: US04554132 (42 worldwide citation)

An apparatus and method for quantitatively measuring volatiles, solids and solvent extractables is described which provides rapid and accurate determinations using microwave heating, electronic balance weighing and solvent extracting of solubles. The method involves subjecting a weighed sample to mi ...


5
Brittany L Hayes, Michael J Collins: Reaction and temperature control for high power microwave-assisted chemistry techniques. CEM Corporation, Summa & Allan P A, June 1, 2004: US06744024 (41 worldwide citation)

A method is disclosed for carrying out microwave assisted chemical reactions. The method includes the steps of placing reactants in a microwave-transparent vessel, placing the vessel and its contents into a microwave cavity, applying microwave radiation within the cavity and to the vessel and its co ...


6
Gary Roger Greene, David Allan Barclay: Use of continuously variable power in microwave assisted chemistry. CEM Corporation, Summa & Allan P A, September 11, 2001: US06288379 (40 worldwide citation)

A method of microwave assisted chemistry is disclosed in which power can be supplied more continuously at preferred power levels to more precisely control or moderate a chemical reaction. The method comprises measuring the duty cycle required to maintain a measured selected parameter of a sample at ...


7
Michael J Collins, Wyatt P Hargett Jr: Analytical process in which materials to be analyzed are directly and indirectly heated and dried by microwave radiation. CEM Corporation, Raymond F Kramer, July 21, 1987: US04681996 (40 worldwide citation)

An apparatus for controllably heating material, such as a material to be analyzed for volatiles or non-volatiles contents, directly and indirectly by microwave radiation, includes a chamber, in which the material to be heated is placed, a source of microwave radiation, for radiating onto materials i ...


8
Michael J Collins: Method and apparatus for improving weighing accuracy. CEM Corporation, September 29, 1981: US04291775 (36 worldwide citation)

A method and apparatus is described for improving the weighing accuracy of sensitive automatic balances when weighing heated substances. This is accomplished by substantially eliminating or reducing convection currents from interfering with and fluctuating the weight being sensed. An air barrier shi ...


9
Collins Michael John, Cruse Jr Bernard William, Goetchius Ronald James: Automatic volatility computer. CEM Corporation, Adrian Jr Herbert M, September 30, 1975: US3909598 (35 worldwide citation)

An automatic volatility computer is described as well as a method for automatically determining weight changes in substances containing volatile material. In particular, there is described an apparatus which automatically determines the percentage of volatiles in a substance which contains unknown q ...


10
Jonathan P Bennett: Pressure resistant reinforcing means for containers for materials to be microwave heated. CEM Corporation, Raymond F Kramer, June 27, 1995: US05427741 (31 worldwide citation)

Containers for materials which are to be microwave heated such as in digesting or extracting operations, are made of thermoplastic material, such as a fluoropolymer, e.g., TEFLON.RTM. PFA, that is strengthened by reinforcing means that may be a fiber reinforced thermoplastic of high tensile strength ...