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Patent Protection Ended

No. Patent No. Title
1861. PI 87001416 INTERPENETRATING POLYMERIC NETWORK FOAMS COMPRISING CROSSLINKED POLYELECTROLYTES.
1862. PI 87001417 JUNCTION BOX.
1863. PI 87001418 IMPROVEMENTS RELATING TO CIGARETTE FILTERS.
1864. PI 87001419 IMPROVEMENTS RELATING TO SMOKING ARTICALE MOUTHPIECES.
1865. PI 87001421 ANIMAL GROWTH PROMOTANT
1866. PI 87001422 CYCLONE SEPARATOR
1867. PI 87001423 AUTOMATIC WATERING AND FEEDING SYSTEM FOR PLANTS.
1868. PI 87001424 MODULAR TOOL FOR DRIVING FASTENERS.
1869. PI 87001425 SEAL STRUCTURE FOR ROTARY BODY AND VANE-TYPE ROTARY COMPRESSOR EMPLOYING THE SAME
1870. PI 87001426 A METHOD OF GENERATING ENERGY
1871. PI 87001427 METHOD AND APPARATUS FOR IMPLEMENTING A THERMODYNAMIC CYCLE WITH INTERCOOLING
1872. PI 87001428 METHOD AND APPARATUS FOR IMPLEMENTING A THERMODYNAMIC CYCLE USING A FLUID OF CHANGING CONCENTRATION.
1873. PI 87001429 METHOD OF AUTOMATICALLY DETECTING AGGLUTINATION REACTION AND APPARATUS THEREFOR
1874. PI 87001430 MAGNETIC ALTERATION OF CELLULOSE DURING ITS BIOSYNTHESIS.
1875. PI 87001431 PROCESS FOR INCREASING THE ENERGY INPUT IN ELECTRIC ARC FURNACES.
1876. PI 87001434 ORAL VACCINES.
1877. PI 87001435 HETEROCYCLIC SULPHONAMIDES.
1878. PI 87001437 (5R,6S,8R)-6-(1-HYDROXYETHYL)-2-(3R-PYRROLIDIN-2-ONE-3-YL-)THIOPENEM-3-CARBOXYLIC ACID.
1879. PI 87001438 COMPRESSOR WITH ROTATION DETECTING DEVICE.
1880. PI 87001439 DIGITAL COLOR DEMODULATOR.