C01B 21/0488
By absorption in liquids
Official title: {by absorption in liquids}
C01B21/0488 (By absorption in liquids) appears on 10 US grants and 0 published applications in this corpus.
Search patents in C01B- Granted patents
- 10
- Published applications
- 0
- Assignees
- 4
- Inventors
- 13
- Latest grant
- 24 Oct 2000
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Liquid absorbent solutions for separating nitrogen from natural gas24 Oct 2000US 6,136,222 ABend Research, Inc.
- Liquid absorbent solutions for separating nitrogen from natural gas20 Jun 2000US 6,077,457 ABend Research, Inc.
- Nitrogen sorption14 May 1996US 5,516,745 ABend Research, Inc.
- Nitrogen sorption6 Jul 1993US 5,225,174 ABend Research, Inc.
- Low pressure noncryogenic processing for ethylene recovery28 May 1991US 5,019,143 A
No published applications in this class yet.
Most cited
By later US patents
- Liquid absorbent solutions for separating nitrogen from natural gas103US 6,136,222 ABend Research, Inc. · 2000
- Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents40US 4,832,718 AAdvanced Extraction Technologies, Inc. · 1989
- Low pressure noncryogenic processing for ethylene recovery39US 5,019,143 A1991
- Process for the purification of non-reacting gases19US 4,406,867 AUnion Carbide Corporation · 1983
- Nitrogen sorption19US 5,516,745 ABend Research, Inc. · 1996