D21H 17/39
Forming ether crosslinkages
Official title: forming ether crosslinkages, e.g. alkylol groups
D21H17/39 (Forming ether crosslinkages) appears on 27 US grants and 8 published applications in this corpus.
Search patents in D21H- Granted patents
- 27
- Published applications
- 8
- Assignees
- 20
- Inventors
- 60
- Latest grant
- 24 May 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 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 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 2 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Modified fiber from shredded pulp sheets, methods, and systems24 May 2022US 11,339,532 B2International Paper Company
- Paper product and method for increasing the strength thereof3 Nov 2020US 10,822,462 B2Kemira Oyj
- Method for producing paper29 Oct 2019US 10,458,068 B2Kemira Oyj
- Method for producing paper8 Oct 2019US 10,435,843 B2Kemira Oyj
- Modified fiber from shredded pulp sheets, methods, and systems18 Dec 2018US 10,156,042 B2International Paper Company
- Paper product and method for increasing the strength thereof13 Jun 2019US 2019/0177492 A1Kemira Oyj
- Modified fiber from shredded pulp sheets, methods, and systems21 Mar 2019US 2019/0085508 A1International Paper Company
- Method for producing paper22 Feb 2018US 2018/0051416 A1Kemira Oyj
- Method for producing paper2 Nov 2017US 2017/0314204 A1Kemira Oyj
- Modified fiber from shredded pulp sheets, methods, and systems29 Jun 2017US 2017/0183817 A1Weyerhaeuser NR Company
Most cited
By later US patents
- Polyamine/epihalohydrin reaction products105US 4,222,921 AMonsanto Company · 1980
- Binder for pre-moistened paper products53US 4,537,807 ABorden, Inc. · 1985
- Paper fiber additive containing polyacrylamide blended with glyoxal and polymeric diallyldimethyl ammonium chloride as a cationic regulator41US 4,217,425 ANalco Chemical Company · 1980
- Nonwoven products having low residual free formaldehyde content37US 4,449,978 AAir Products and Chemicals, Inc. · 1984
- Increasing the stiffness of paper25US 4,966,652 AAmerican Cyanamid Company · 1990