E21D 11/157
Laggings making use of fluid cushions
Official title: {Laggings making use of fluid cushions, e.g. the fluid containing a hardenable material (chocks made of flexible containers E21D15/483)}
E21D11/157 (Laggings making use of fluid cushions) appears on 8 US grants and 0 published applications in this corpus.
Search patents in E21D- Granted patents
- 8
- Published applications
- 0
- Assignees
- 6
- Inventors
- 11
- Latest grant
- 23 Feb 1999
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Rigidifiable plastic composites and manufacturing methods therefor23 Feb 1999US 5,874,151 AILC Dover, Inc.
- Method of making three dimensional articles from rigidizable plastic composites29 Jul 1997US 5,651,848 AILC Dover, Inc.
- Mine support bag1 Apr 1997US 5,615,979 A
- Preload headboard for an elongate prop22 Feb 1994US 5,288,178 AHL&H Timber Products (PTY) Ltd.
- Method and apparatus for formation of a tunnel lining23 Jan 1990US 4,895,480 ASignode Corporation
No published applications in this class yet.
Most cited
By later US patents
- Method of making three dimensional articles from rigidizable plastic composites19US 5,651,848 AILC Dover, Inc. · 1997
- Rigidifiable plastic composites and manufacturing methods therefor17US 5,874,151 AILC Dover, Inc. · 1999
- Method and device for the backfilling of roadway supports in mine and tunnel construction with the aid of support hoses having a hardening filler11US 4,465,405 AGTG Gesteins- und Tiefbau GmbH · 1984
- Underground roadway or tunnel support9US 4,120,164 ACoal Industry (Patents) Limited · 1978
- Mine support bag8US 5,615,979 A1997