D21H 3/82
Paper or cardboard prepared by adding substances to the pulp or to
Official title: {by adding insoluble coloured substances, e.g. powders, fibres, pieces of metal, for obtaining different colours in the paper fancy papers; substances characterised by their physical appearance, e.g. form, rather than by their chemical constitution}
D21H3/82 (Paper or cardboard prepared by adding substances to the pulp or to) appears on 8 US grants and 3 published applications in this corpus.
Search patents in D21H- Granted patents
- 8
- Published applications
- 3
- Assignees
- 5
- Inventors
- 11
- Latest grant
- 14 Feb 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 5 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Papers comprising aerogel powder and aramid polymer fibrils14 Feb 2023US 11,578,461 B2Dupont Safety & Construction, Inc.
- Oyster paper and manufacturing method thereof2 Aug 2022US 11,401,391 B2Don Jia Poly Plastic Ltd.
- Barrier products2 Apr 1991US 5,004,645 ADRG (UK) Limited
- Organic pigments20 Nov 1984US 4,483,959 AHercules Incorporated
- Organic pigments4 Sep 1984US 4,469,555 AHercules Incorporated
- Papers comprising aerogel powder and aramid polymer fibrils25 Nov 2021US 2021/0363699 A1Dupont Safety & Construction, Inc.
- Paper sheet mulches and methods of making the same12 Nov 2020US 2020/0354892 A1GPCP IP Holdings LLC
- Oyster paper and manufacturing method thereof23 Jan 2020US 2020/0024411 A1Don Jia Poly Plastic Ltd.
Most cited
By later US patents