|
| US3950169 | 3 Jan 1975 | 13 Apr 1976 | AGFA-GEVAERT N.V. | Electrophotographic element with polymeric conductive layer |
| US4011080 | 30 Aug 1974 | 8 Mar 1977 | Eastman Kodak Company | Electrophotographic elements comprising polysilicic acid-crosslinked conductive polymers |
| US4024311 | 30 Oct 1975 | 17 May 1977 | International Paper Company | Electroconductive paper coating |
| US4037017 | 8 Dec 1975 | 19 Jul 1977 | Hercules Incorporated | Electroconductive paper |
| US4057554 | 10 Mar 1975 | 8 Nov 1977 | Petrolite Corporation | Quaternary ammonium salts of polyepihalohydrin |
| US4062832 | 3 Mar 1976 | 13 Dec 1977 | The Dow Chemical Company | Quaternized epichlorohydrin copolymer useful in treating potable water and method of preparation |
| US4156775 | 26 Jan 1976 | 29 May 1979 | The Dow Chemical Company | Quaternary ammonium salts of epihalohydrin polymers as additives for fibrous materials |
| US4198269 | 9 Mar 1979 | 15 Apr 1980 | The Dow Chemical Company | Quaternary ammonium salts of epihalohydrin polymers as additives for fibrous cellulosic materials |
| US4275103 | 5 Jul 1979 | 23 Jun 1981 | Matsushita Electric Industrial Co., Ltd. | Electrographic recording medium with conductive layer containing metal oxide semiconductor |
| US4309486 | 16 Jan 1979 | 5 Jan 1982 | Felix Schoeller Jr. GmbH & Co. KG | Electrostatic recording material |