F. J. Burrus & Cie.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4501579 Cigarette filter unitsExpiredNov 14, 83Feb 26, 85[A24C]
4303080 Method for producing filter cigarettesExpiredMar 31, 78Dec 01, 81[A24C, A24D]
4281591 Production of cigarette filter unitsExpiredMar 31, 78Aug 04, 81[B31B, A24D]
4185645 Production of cigarette filter unitsExpiredJul 21, 78Jan 29, 80[A24C]

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