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Publication numberUS3714786 B1
Publication typeGrant
Publication dateFeb 11, 1986
Filing dateAug 3, 1970
Priority dateAug 3, 1970
Publication numberUS 3714786 B1, US 3714786B1, US-B1-3714786, US3714786 B1, US3714786B1
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet

US 3714786 B1
Abstract  available in
Description  available in
Claims  available in
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3898778 *Jan 10, 1974Aug 12, 1975Erickson Lennart GSlotted drainage conduit and integral concrete floor
US4322179 *Apr 28, 1980Mar 30, 1982Bethlehem Steel CorporationOpen top drain
US4365911 *Jul 16, 1981Dec 28, 1982Ramco Steel, Inc.Surface drainage culvert
US4407055 *Aug 27, 1982Oct 4, 1983Ramco Steel, Inc.Method of making surface drainage culvert
US4451172 *Mar 10, 1982May 29, 1984Bethlehem Steel Corp.Open top drain
US4787773 *May 28, 1987Nov 29, 1988Kehler Glen MSurface drainage system
US5829916 *Aug 27, 1996Nov 3, 1998Dixie Septic Tank, Inc. Of Orange CityDrainfield pipe
US6000881 *Feb 17, 1998Dec 14, 1999Zurn Industries, Inc.Trench drain
US6113311 *Sep 27, 1999Sep 5, 2000Zurn Industries, Inc.Trench drain
US6120209 *Oct 21, 1998Sep 19, 2000Dixie Septic Tank, Inc. Of Orange CityMethod of installing drainfield pipe
US6336770Mar 21, 2000Jan 8, 2002Kelvin Todd EvansDrainfield pipe installation device
US6648810 *Nov 9, 2000Nov 18, 2003Radi Medical Technologies AbMedical device
US6746179Feb 26, 2002Jun 8, 2004Dirk M. KerkhoffSystem component, system and method for aerating of compost and the draining of excess liquid contained therein
US7264418 *Oct 5, 2006Sep 4, 2007Houck Randall JModular slotted drain assembly
US7413372Apr 20, 2005Aug 19, 2008Tuf-Tite, Inc.Trench drain frame and grate assembly
US8708603Nov 8, 2013Apr 29, 2014Buildworks Systems, Inc.Apparatus for aerating and draining
US8734051Feb 22, 2011May 27, 2014Buildworks Systems, Inc.Apparatus for aerating and draining
EP0073601A1 *Aug 18, 1982Mar 9, 1983Charcon LimitedImprovements in drainage blocks
Classifications
International ClassificationE02B11/00
Cooperative ClassificationE02B11/005
European ClassificationE02B11/00B
Legal Events
DateCodeEventDescription
Sep 20, 1986AS02Assignment of assignor's interest
Owner name: ARMCO INC., 703 CURTIS STREET, MIDDLETOWN, OH 4504
Effective date: 19860722
Owner name: CONTECH CONSTRUCTION PRODUCTS INC., AN OH CORP
Sep 20, 1986ASAssignment
Owner name: ARMCO INC., 703 CURTIS STREET, MIDDLETOWN, OH 450
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CONTECH CONSTRUCTION PRODUCTS INC., AN OH CORP;REEL/FRAME:004609/0237
Effective date: 19860722
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CONTECH CONSTRUCTION PRODUCTS INC., AN OH CORP;REEL/FRAME:004609/0237
Aug 1, 1986ASAssignment
Owner name: CONTECH CONSTRUCTION PRODUCTS INC., 1001 GROVE STR
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ARMCO INC.;REEL/FRAME:004599/0955
Effective date: 19860722
Owner name: MELLON BANK (EAST), NATIONAL ASSOCIATION
Free format text: SECURITY INTEREST;ASSIGNOR:CONTECH CONSTRUCTION PRODUCTS INC., AN OH. CORP.;REEL/FRAME:004600/0031
Effective date: 19860721
Owner name: CONTECH CONSTRUCTION PRODUCTS INC., A OHIO CORP.,O
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ARMCO INC.;US-ASSIGNMENT DATABASE UPDATED:20100521;REEL/FRAME:4599/955
Owner name: MELLON BANK (EAST), NATIONAL ASSOCIATION,STATELESS
Free format text: SECURITY INTEREST;ASSIGNOR:CONTECH CONSTRUCTION PRODUCTS INC., AN OH. CORP.;US-ASSIGNMENT DATABASE UPDATED:20100524;REEL/FRAME:4600/31
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ARMCO INC.;REEL/FRAME:004599/0955
Feb 11, 1986B1Reexamination certificate first reexamination
Oct 30, 1984RRRequest for reexamination filed
Effective date: 19840907