D21F 11/004
Processes for making continuous lengths of paper, or of cardboard, or of
Official title: {by modification of the viscosity of the suspension}
D21F11/004 (Processes for making continuous lengths of paper, or of cardboard, or of) appears on 15 US grants and 0 published applications in this corpus.
Search patents in D21F- Granted patents
- 15
- Published applications
- 0
- Assignees
- 8
- Inventors
- 21
- Latest grant
- 24 Aug 1993
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Wetlaid nonwovens on high speed machines24 Aug 1993US 5,238,534 AJames River Corporation of Virginia
- Methods for manufacturing paper products19 May 1992US 5,114,539 APaper Chemistry Laboratory, Inc.
- Manufacture of wetlaid nonwoven webs15 May 1990US 4,925,528 AJames River Corporation of Virginia
- Manufacture of wet laid nonwoven webs18 Apr 1989US 4,822,452 AJames River Corporation of Virginia
- Method for manufacturing paper products4 Aug 1987US 4,684,440 APaper Chemistry Laboratory, Inc.
No published applications in this class yet.
Most cited
By later US patents
- Tufted nonwoven fibrous web58US 4,042,453 AThe Dexter Corporation · 1977
- Wetlaid nonwovens on high speed machines38US 5,238,534 AJames River Corporation of Virginia · 1993
- Viscous dispersion for forming wet-laid, non-woven fabrics36US 4,049,491 AInternational Paper Company · 1977
- Viscous dispersion for forming wet-laid, non-woven fabrics25US 4,200,488 AInternational Paper Company · 1980
- Improved pulp sheet formation21US 4,198,267 ADorset Industrial Chemicals Ltd. · 1980