Fixing and drying cytological smears
First Claim
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1. AN AEROSOL COMPOSITION COMPOSED OF A MIXTURE OF WATER-SOLUBLE POLYETHYLENE GLYCOLS DISSOLVED IN AN ALKANOL SOLVENT, AND A HALO-ALKANE PROPELLANT, AND WHICH BY WEIGHT CONSISTS ESSENTIALLY OF:
- (A) FROM ABOUT 10 TO ABOUT 19.5 PERCENT OF A WATERMISCIBLE LOWER ALKANOL SOLVENT WHICH IS A DEHYDRATING AGENT AND CONTAINS BY WEIGHT FROM ABOUT 3 TO ABOUT 10 PERCENT OF WATER;
(B) FROM ABOUT 0.25 TO ABOUT 0.95 PERCENT OF THE WATERSOLUBLE POLYETHYLENE GLYCOLS MIXTURE OF AT LEAST ONE ORDINARILY LIQUID POLYETHYLENE GLYCOL AND AT LEAST ONE ORDINARILY SOLID POLYEHTYLENE GLYCOL SO PROPORTIONED TO ONE ANOTHER THAT THE FILM LEFT AFTER EVAPORATION OF SAID AQUEOUS ALKANOL FROM AN UNCONFINED LAYER OF A SOLUTION OF FROM ABOUT 15 TO ABOUT 60 GRAMS OF SAID GLYCOL MIXTURE PER LITER OF SAID AQUEOUS ALKANOL DEPOSITED ON A FLAT NON-ABSORBENT SURFACE IS DRY TO THE TOUCH, FIRM, NON-BRITTLE, NON-FLAKY, FLOW-RESISTANT AND OF WAXY APPEARANCE;
(C) FROM ABOUT 89 TO ABOUT 79 PERCENT OF A SUBSTANTIALLY NON-TXIC HALO-ALKANE AEROSOL PROPELLANT CHEMICALLY INERT TO SAID ALKANOL SOLVENT AND GLYCOLS MIXTURE AND MISCIBLE WITH ITS SOLUTION IN SAID SOLVENT, AND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 103 TO ABOUT 204 AND UNDER 3 CARBON ATOMS WITH ONLY CHLORINE AND FLUORINE LINKED TO EACH CARBON AND AT MOST ONLY ONE HYDROGEN LINKED TO THE CARBON WHEN THE ALKANE HAS ONLY ONE CARBON ATOM;
SAID WATER CONTENT OF SAID ALKANOL SOLVENT BEING SUFFICIENT TO ENABLE SAID SOLVENT TO DISSOLVE THE POLYETHYLENE GLYCOLS MIXTURE CONTENT.
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1 Claim
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1. AN AEROSOL COMPOSITION COMPOSED OF A MIXTURE OF WATER-SOLUBLE POLYETHYLENE GLYCOLS DISSOLVED IN AN ALKANOL SOLVENT, AND A HALO-ALKANE PROPELLANT, AND WHICH BY WEIGHT CONSISTS ESSENTIALLY OF:
- (A) FROM ABOUT 10 TO ABOUT 19.5 PERCENT OF A WATERMISCIBLE LOWER ALKANOL SOLVENT WHICH IS A DEHYDRATING AGENT AND CONTAINS BY WEIGHT FROM ABOUT 3 TO ABOUT 10 PERCENT OF WATER;
(B) FROM ABOUT 0.25 TO ABOUT 0.95 PERCENT OF THE WATERSOLUBLE POLYETHYLENE GLYCOLS MIXTURE OF AT LEAST ONE ORDINARILY LIQUID POLYETHYLENE GLYCOL AND AT LEAST ONE ORDINARILY SOLID POLYEHTYLENE GLYCOL SO PROPORTIONED TO ONE ANOTHER THAT THE FILM LEFT AFTER EVAPORATION OF SAID AQUEOUS ALKANOL FROM AN UNCONFINED LAYER OF A SOLUTION OF FROM ABOUT 15 TO ABOUT 60 GRAMS OF SAID GLYCOL MIXTURE PER LITER OF SAID AQUEOUS ALKANOL DEPOSITED ON A FLAT NON-ABSORBENT SURFACE IS DRY TO THE TOUCH, FIRM, NON-BRITTLE, NON-FLAKY, FLOW-RESISTANT AND OF WAXY APPEARANCE;
(C) FROM ABOUT 89 TO ABOUT 79 PERCENT OF A SUBSTANTIALLY NON-TXIC HALO-ALKANE AEROSOL PROPELLANT CHEMICALLY INERT TO SAID ALKANOL SOLVENT AND GLYCOLS MIXTURE AND MISCIBLE WITH ITS SOLUTION IN SAID SOLVENT, AND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 103 TO ABOUT 204 AND UNDER 3 CARBON ATOMS WITH ONLY CHLORINE AND FLUORINE LINKED TO EACH CARBON AND AT MOST ONLY ONE HYDROGEN LINKED TO THE CARBON WHEN THE ALKANE HAS ONLY ONE CARBON ATOM;
SAID WATER CONTENT OF SAID ALKANOL SOLVENT BEING SUFFICIENT TO ENABLE SAID SOLVENT TO DISSOLVE THE POLYETHYLENE GLYCOLS MIXTURE CONTENT.
- (A) FROM ABOUT 10 TO ABOUT 19.5 PERCENT OF A WATERMISCIBLE LOWER ALKANOL SOLVENT WHICH IS A DEHYDRATING AGENT AND CONTAINS BY WEIGHT FROM ABOUT 3 TO ABOUT 10 PERCENT OF WATER;
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Current AssigneeKerpe Zadeikis Stase, Theodore Ehrenreich
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Original AssigneeKerpe Zadeikis Stase, Theodore Ehrenreich
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InventorsTHEODORE EHRENREICH, KERPE ZADEIKIS STASE
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Application NumberUS04/506,124Time in Patent Office959 DaysField of SearchUS Class Current435/40.51CPC Class CodesG01N 1/30 Staining; Impregnating ; Fi...G01N 2001/307 non-toxic, no Hg, no formal...
