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Patent Protection Ended

No. Patent No. Title
1981. PI 87001560 SURGICAL FILAMENTS FROM VINYLIDENE FLUORIDE COPOLYMERS
1982. PI 87001561 ASPIRATION FITTING ADAPTOR.
1983. PI 87001562 CLEAN AND DRY APPEARANCE FACING.
1984. PI 87001563 TOOTHBRUSH.
1985. PI 87001564 7-ACYLAMINO-3-VINYLCEPHALOSPORANIC ACID DERIVATIVES, PROCESSES FOR THEIR PREPARATION, PHARMACEUTICAL COMPOSITIONS CONTAINING THEM, THEIR STARTING COMPOUNDS AND THEIR PREPARATION
1986. PI 87001565 SPLICE CASE FOR OPTICAL FIBRE CABLE.
1987. PI 87001566 ABSORBENT ARTICLE.
1988. PI 87001567 ENZYMATIC HYDROLYSIS OF BEEF TALLOW
1989. PI 87001568 ELECTRIC SWITCH.
1990. PI 87001569 TOILET SOAP BARS MADE FROM TOPPED, DISTILLED COCO FATTY ACID.
1991. PI 87001570 APPARATUS FOR FILLING CONTAINERS.
1992. PI 87001571 PROCESS FOR THE PREPARATION OF THE MODIFICATION A OF CIMETIDINE.
1993. PI 87001572 TRICYCLIC PYRIDINE DERIVATIVES.
1994. PI 87001573 DIHYDROBENZOPYRAN DERIVATIVES.
1995. PI 87001576 PHENETHYLAMINE DERIVATIVES
1996. PI 87001578 IMPROVED DRILLING FLUIDS BASED ON A MIXTURE OF SULFONATED THERMOPLASTIC POLYMER AND AN AMINETREATED CLAY.
1997. PI 87001579 AN AUTOMATIC DEVICE FOR ALIGNING FISHES OR SHRIMPS
1998. PI 87001580 NOVEL DERIVATIVES OF 4, 5-DIHYDROOXAZOLES, A PROCESS FOR THEIR PREPARATION, AND THEIR USE.
1999. PI 87001581 OSCILLATING PROPELLER TYPE AERATOR APPARATUS AND METHOD
2000. PI 87001582 METHOD FOR MAKING AXIAL-FLOW FILTER AND APPARATUS THEREFOR