Chem-tronics, Incorporated

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6991669 System and method for silver recovery and monitoringExpiredJun 14, 02Jan 31, 06[C22B]
2005/0129,575 Heavy metals monitoring apparatusAbandonedNov 12, 04Jun 16, 05[G01N]
5669524 EnclosuresExpiredJul 11, 94Sep 23, 97[B65D]
5262220 High strength structure assembly and method of making the sameExpiredJun 18, 91Nov 16, 93[B64B, B32B]
4848122 Method and apparatus for deburring using shotExpiredJul 20, 87Jul 18, 89[B21J]
4815086 Laser pulse modulatorExpiredMar 16, 87Mar 21, 89[H01S]
4779848 Cooling muff used in thermal processing methodExpiredJan 23, 86Oct 25, 88[C21D]
4726878 Chemical milling method for interiors of narrow tubesExpiredDec 08, 86Feb 23, 88[C23F]
4725334 Method of forming integrally stiffened structuresExpiredNov 18, 85Feb 16, 88[C23F, B44C]
4687702 Structural insulating panel and method of making the panelExpiredJun 20, 86Aug 18, 87[B05D, B32B]
4588474 Chemical milling processes and etchants thereforExpiredMay 01, 84May 13, 86[C03C, C23F, B44C]
4376662 Methods for fabricating metallic workpiecesExpiredMay 05, 80Mar 15, 83[C21D]
4304982 Optical viewing system associated apparatus and machines equipped therewithExpiredMay 28, 80Dec 08, 81[B23K]
4188811 Metal forming methodsExpiredJul 26, 78Feb 19, 80[B21D]

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