|
| US4240915 | 13 Jul 1978 | 23 Dec 1980 | W. R. Grace & Co. | Drilling mud viscosifier |
| US4240924 | 22 Mar 1979 | 23 Dec 1980 | W. R. Grace & Co. | Compositions capable of forming aqueous systems having pseudoplastic properties |
| US4242223 | 11 Jul 1979 | 30 Dec 1980 | Deutsche Gold- und Silber-Scheideanstalt vormals Roessler | Process for receiving, storing and handling aluminum hydroxide wet hydrate |
| US4301867 | 30 Jun 1980 | 24 Nov 1981 | Marathon Oil Company | Process for selectively reducing the permeability of a subterranean sandstone formation |
| US4349443 | 27 Feb 1981 | 14 Sep 1982 | W. R. Grace & Co. | Viscosifier and fluid loss control system |
| US4366070 | 27 Feb 1981 | 28 Dec 1982 | W. R. Grace & Co. | Viscosifier & fluid loss control system |
| US4428845 | 2 Dec 1981 | 31 Jan 1984 | W. R. Grace & Co. | Viscosifier and fluid loss control system |
| US4473124 | 2 May 1983 | 25 Sep 1984 | Mobil Oil Corporation | Method for operating rotary drilling under conditions of high cuttings transport efficiency |
| US4473479 | 6 Dec 1982 | 25 Sep 1984 | W. R. Grace & Co. | Viscosifier and fluid loss control system |
| US5151203 | 21 Jun 1991 | 29 Sep 1992 | Halliburton Company | Composition and method for cementing a well |
| US5335725 | 23 Jul 1993 | 9 Aug 1994 | Shell Oil Company | Wellbore cementing method |
| USRE31748 | 2 Dec 1982 | 27 Nov 1984 | W. R. Grace & Co. | Viscosifier and fluid loss control system |