AMERICAN COLLOID COMPANY

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5221290 Charcoal briquettes bound with an organic binder and a water-swellable clay and methodExpiredFeb 04, 91Jun 22, 93[C10L]
5180255 Moisture-impervious panel capable of delayed hydrationExpiredMay 29, 91Jan 19, 93[E02D]
5106015 ContainerExpiredJul 15, 91Apr 21, 92[B65D]
5063100 Moisture-impervious panel capable of delayed, rapid hydration including water channels filled with water-removal materialExpiredFeb 15, 90Nov 05, 91[F02D, B32B]
5053265 Moisture-imprevious panel capable of delayed hydrationExpiredFeb 15, 90Oct 01, 91[E02D, B32B]
4990028 Anti-friction composition containing MgO and methodExpiredMay 05, 88Feb 05, 91[E03F]
4944634 Anti-friction composition containing MgO and methodExpiredOct 04, 85Jul 31, 90[C09K, E02F]
4936386 Method for sealing well casings in the earthExpiredNov 09, 89Jun 26, 90[E21B]
4919989 Article for sealing well castings in the earthExpiredApr 10, 89Apr 24, 90[E21B]
4847226 Process for extruding and acid treating clay for improved filtrationExpiredJan 28, 87Jul 11, 89[B01J]
4794140 Production process for manufacturing low molecular weight water soluble acrylic polymers as drilling fluid additivesExpiredNov 30, 87Dec 27, 88[C08J]
4793937 Method and apparatus for separating contaminants from fluidizable solidsExpiredApr 10, 87Dec 27, 88[F23G]
4778608 High temperature drilling mud compositionExpiredSep 11, 86Oct 18, 88[C09K]
4733989 Self-healing bentonite sheet material composite drainage structureExpiredMar 04, 86Mar 29, 88[E02B, E02D]
4709767 Production process for manufacturing low molecular weight water soluble acrylic polymers as drilling fluid additivesExpiredJan 06, 86Dec 01, 87[E21B]
4624982 Method of temporarily inhibiting the swellability of water swellable clays and compositionsExpiredApr 05, 85Nov 25, 86[C08K]
4613542 Method of impregnating a water-penetrable article with a swell-inhibited water swellable clay slurryExpiredAug 16, 85Sep 23, 86[B05D, B32B]
4514510 Hydrogen enriched water swellable clay having reduced acid demand and stable at low pHExpiredSep 08, 83Apr 30, 85[C04B, B01J]
4439062 Sealing system and method for sealing earthen containersExpiredDec 21, 81Mar 27, 84[E02B]
4430027 Method of forming a foundation with liquid tight jointsExpiredAug 26, 81Feb 07, 84[E02D]

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