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Document Number
US Patent 5853618
Issued Date
December 29, 1998
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Abstract
The present invention concerns a foam having a bulk density of less than 250 g/l; the foam having a stability in air of at least 15 seconds (and preferably at least 30 seconds), the stability being defined as the time for the foam to collapse to half its volume when measured in a 111 mm internal diameter and 62 mm internal height glass beaker; wherein the foam has a stability on water at 20.degree. C. of less than 2 hours, the stability on water being defined as the time taken for a 150 ml foam mass on the surface of 450 ml distilled water in a 111 mm internal diameter and 62 mm internal height glass beaker, to collapse to reveal a 2 cm diameter area of the water surface which is substantially free from foam.
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Number of Claims:
8
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Owner
Published
December 29, 1998
Application Number
08/983,205
Filed
May 5, 1998
US Classification
8/137   252/179 510/337 516/14 516/15 516/16 516/18 521/50 521/82 521/85 521/89 521/97
Int'l Classification
C09K   3/30   (20060101)   C11D   11/00   (20060101)   C11D   17/00   (20060101)  
Examiner
Priority Data
Jul 13, 1995 [EP] 95870088
USPTO Field of Search
8/137   252/321   252/358   252/170   252/179   521/50   521/82   521/85   521/89   521/97  
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Description
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