Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAERMSCHUTZ BIERGANS and CO KG 5000 KOELN
Original Assignee
LAERMSCHUTZ BIERGANS and CO KG 5000 KOELN
Publication of DE7602405U1publicationCriticalpatent/DE7602405U1/de
E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
E01F8/0064—Perforated plate or mesh, e.g. as wall facing
E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material
Preparation of 3-(alkylthio)propanal comprises reaction of glycerin or compounds obtained from glycerin, with a sulfur compound or compounds obtained from sulfur compound in the presence of a catalyst