|
| US4060447 | 29 Mar 1976 | 29 Nov 1977 | Philip A. Hunt Chemical Corporation | Process for etching of metal |
| US4147581 | 14 Sep 1977 | 3 Apr 1979 | Philip A. Hunt Chemical Corp. | Etching of metal |
| US4249939 | 3 Jan 1980 | 10 Feb 1981 | The Dow Chemical Company | Method of disposing of spent organic complexing solutions containing cuprous halides |
| US4294434 | 24 Jan 1980 | 13 Oct 1981 | | Heavy metal removal apparatus |
| US4304599 | 29 Jul 1980 | 8 Dec 1981 | | Heavy metal removal process |
| US4329210 | 28 Mar 1980 | 11 May 1982 | Robert W. Becker | Method of regenerating etchant and recovering etched metal |
| US4481236 | 2 May 1983 | 6 Nov 1984 | General Motors Corporation | Life extension of catalyst predip baths |
| US4532887 | 21 Jun 1984 | 6 Aug 1985 | General Motors Corporation | Life extension of catalyst predip baths |
| US4783249 | 26 Jun 1987 | 8 Nov 1988 | Napco, Inc. | Electroplating apparatus with self-contained rinse water treatment |
| US4885036 | 19 Apr 1988 | 5 Dec 1989 | Digital Equipment Corporation | On-line filtration of potassium permanganate |
| US5002616 | 28 Aug 1989 | 26 Mar 1991 | Chemcut Corporation | Process and apparatus for fliud treatment of articles |
| US5019273 | 30 Apr 1990 | 28 May 1991 | Midwest Printed Circuits Services, Inc. | Method for recovery of heavy metals from highly concentrated wastewater solutions |
| US5133873 | 22 Feb 1991 | 28 Jul 1992 | Miles Inc. | Process for removal of copper ions from aqueous effluent |
| US5135654 | 24 Sep 1991 | 4 Aug 1992 | KDF Fluid Treatment, Inc. | Method for treating fluids |
| US5275737 | 19 Nov 1992 | 4 Jan 1994 | KDF Fluid Treatment, Inc. | Method for treating fluids |
| US5314623 | 28 Jul 1993 | 24 May 1994 | KDF Fluid Treatment, Inc. | Method for treating fluids |
| US5433856 | 6 May 1994 | 18 Jul 1995 | KDF Fluid Treatment, Inc. | Method for treating fluids |
| US5472618 | 7 Feb 1994 | 5 Dec 1995 | Great Western Chemical Company | Method for recovering metals from solutions |
| US5510034 | 29 Mar 1995 | 23 Apr 1996 | KDF Fluid Treatment, Inc. | Method for treating fluids |
| US5524780 | 31 Jan 1995 | 11 Jun 1996 | Applied Electroless Concepts Inc. | Control of regeneration of ammoniacal copper etchant |
| US5599454 | 18 Mar 1996 | 4 Feb 1997 | KDF Fluid Treatment, Inc. | Method for treating fluids |
| US5614264 | 11 Aug 1995 | 25 Mar 1997 | Atotech USA, Inc. | Fluid delivery apparatus and method |
| US5679259 | 10 Oct 1995 | 21 Oct 1997 | Great Western Chemical Company | Method for recovering metals from solutions |
| US5833859 | 31 Oct 1996 | 10 Nov 1998 | KDF Fluid Treatment, Inc. | Method for treating fluids |
| US5904773 | 21 Jan 1997 | 18 May 1999 | Atotech USA, Inc. | Fluid delivery apparatus |
| US5951869 | 28 May 1998 | 14 Sep 1999 | KDF Fluid Treatment, Inc. | Method for treating fluids |
| US6045874 | 6 Nov 1998 | 4 Apr 2000 | Atotech USA, Inc. | Fluid delivery method |
| US6168663 | 30 Oct 1997 | 2 Jan 2001 | Eamon P. McDonald
Seamus P. McDonald | Thin sheet handling system cross-reference to related applications |
| US6971125 | 26 Apr 2005 | 6 Dec 2005 | | Antimicrobial whirlpool bathtub |
| US7146659 | 18 Aug 2005 | 12 Dec 2006 | | Hydromassage antimicrobial whirlpool bathtub |
| US7203977 | 26 Aug 2005 | 17 Apr 2007 | Roy W. Mattson, Jr.
Paulette C. Ogden | Fill and drain jetted hydromassage antimicrobial water vessel |
