NSI ENTERPRISES, INC. (NOW KNOWN AS NATIONAL SERVICE INDUSTRIES, INC.)

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5030189 Method of making envelope with tear line formed by ultrasonic energyExpiredDec 27, 89Jul 09, 91[B31B]
4790766 Electrical power track systemExpiredApr 01, 87Dec 13, 88[H01R]
4533190 Electrical power track systemExpiredDec 09, 83Aug 06, 85[H01R]
D264072 Electrical connectorExpiredJan 18, 80Apr 27, 82[D130]
D264073 Electrical connectorExpiredJan 18, 80Apr 27, 82[D130]
D259244 Cable hangerExpiredJun 04, 79May 19, 81[D080]
D254693 Light diffuser for luminaire as shown and describedExpiredDec 02, 77Apr 08, 80[D260]
D254215 LuminaireExpiredDec 02, 77Feb 12, 80[D260]

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