Avco Everett Research Laboratory, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4756765 Laser removal of poor thermally-conductive materialsExpiredDec 12, 83Jul 12, 88[B08B]
4714902 Gaseous non linear dispersion laser beam controlExpiredJun 17, 85Dec 22, 87[G02B, G02F]
4633103 Two cell stimulated Raman scattering frequency conversion laserExpiredMay 04, 83Dec 30, 86[H03F]
4620305 Gas laser and method of operationExpiredSep 17, 84Oct 28, 86[H01S]
4583023 Electron beam heated thermionic cathodeExpiredJul 23, 84Apr 15, 86[H01J]
4518232 Method and apparatus for optical beam shapingExpiredAug 24, 83May 21, 85[G02B]
4477332 Solubilization of carbonaceous materialExpiredJul 25, 83Oct 16, 84[C10G, C10B]
4468279 Method for laser melting of siliconExpiredAug 16, 82Aug 28, 84[C30B]
4437026 Apparatus for electrode current control in linear MHD generatorsExpiredDec 17, 80Mar 13, 84[H02K]
4323925 Method and apparatus for arraying image sensor modulesExpiredJul 07, 80Apr 06, 82[H01L, H04N]
4313739 Removal of contaminants from gasesExpiredOct 27, 80Feb 02, 82[B03C]
4289397 Laser ceilometer signal processing meansExpiredJul 20, 79Sep 15, 81[G01C, G06G, G06J]
4283686 Laser operation with closed gas and tuned duct pulsingExpiredMar 21, 79Aug 11, 81[H01S]
4278445 Subsonic-velocity entrained-bed gasification of coalExpiredMay 31, 79Jul 14, 81[C10J]
4278446 Very-high-velocity entrained-bed gasification of coalExpiredMay 31, 79Jul 14, 81[C10J]
4264146 Folding laser mirrorExpiredJan 14, 80Apr 28, 81[G02B]
4259988 Vortex-diode check valve with flexible diaphragmExpiredSep 17, 79Apr 07, 81[F15C]
4258753 Fluidic switchExpiredMay 18, 79Mar 31, 81[F15C]
4237404 Spark gap controlExpiredMay 18, 79Dec 02, 80[H01J, H05B]
4229708 X-ray laserExpiredApr 08, 77Oct 21, 80[H01S]

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