B28B 21/94
For impregnating or coating by applying liquids or semi-liquids
Official title: for impregnating or coating by applying liquids or semi-liquids
B28B21/94 (For impregnating or coating by applying liquids or semi-liquids) appears on 15 US grants and 6 published applications in this corpus.
Search patents in B28B- Granted patents
- 15
- Published applications
- 6
- Assignees
- 12
- Inventors
- 33
- Latest grant
- 17 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 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 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Pre-stressed concrete pipe17 Jan 2023US 11,555,562 B1
- Method and apparatus for producing a sewer pipe element31 Mar 2020US 10,603,818 B2Bfs Betonfertigteilsysteme GmbH
- Method of making ceramic composite bearings19 Nov 2019US 10,478,996 B1Lancer Systems L.P.
- Method and device for manufacturing a canal component5 Feb 2019US 10,195,763 B2Bfs Betonfertigteilesysteme GmbH
- Method and an apparatus for the manufacture of concrete pipes29 Nov 2011US 8,066,931 B2Pedershaab Concrete Technologies A/S
- Method and apparatus for producing a sewer pipe element20 Apr 2017US 2017/0106562 A1Bfs Betonfertigteilesysteme GmbH
- Method and device for producing a sewer component28 Jul 2016US 2016/0214275 A1Bfs Betonfertigteilesysteme GmbH
- Method And An Apparatus For The Manufacture Of Concrete Pipes29 Dec 2011US 2011/0318446 A1Pedershaab Concrete Technologies A/S
- Method and an apparatus for the manufacture of concrete pipes16 Feb 2006US 2006/0033227 A1Pedershaab Concrete Technologies A/S
- Method and device for the production of a multi-layer concrete pipe2 Dec 2004US 2004/0237848 A1
Most cited
By later US patents
- Process for the continuous production of pipe from particulate materials8US 4,685,873 AOwens-Corning Fiberglas Corporation · 1987
- Method of producing concrete composite pipe8US 5,035,850 ANoritake Co., Limited · 1991
- Method of manufacturing an inner lined pipe7US 5,176,869 ANippon Shokubai Co., Ltd. · 1993
- Method for manufacture of polymer-impregnated hollow concrete product5US 4,314,957 AOzawa Concrete Industry Co., Ltd. · 1982
- Method for the production of concrete pipes5US 5,051,223 A1991