Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUSD400670 S
Publication typeGrant
Application numberUS 29/053,607
Publication dateNov 3, 1998
Filing dateApr 25, 1996
Publication number053607, 29053607, US D400670 S, US D400670S, US-S-D400670, USD400670 S, USD400670S
InventorsFelix L. Sorkin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US D400670 S
Abstract  available in
Previous page
Next page
  1. The ornamental design for a duct, as shown and described.

FIG. 1 is a perspective view of a duct showing my design;

FIG. 2 is a side elevational view thereof, the other sides being identical to that shown; and,

FIG. 3 is an end view thereof, the opposite end being a mirror image of that shown.

Non-Patent Citations
1VSL Corporation, VSL Post-Tensioning Systems, Mar. 1994, pp. 1-30.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6464263 *Mar 15, 2000Oct 15, 2002Pma AgConnector for a corrugated pipe with locking portion
US6550816Jan 25, 2002Apr 22, 2003Felix L. SorkinGrout vent for a tendon-receiving duct
US6659135Dec 29, 2000Dec 9, 2003Felix L. SorkinTendon-receiving duct with longitudinal channels
US6666233Mar 4, 2003Dec 23, 2003Felix L. SorkinTendon receiving duct
US6752435May 7, 2002Jun 22, 2004Felix L. SorkinSymmetrical coupler apparatus for use with precast concrete segmental construction
US6764105May 7, 2002Jul 20, 2004Felix L. SorkinDuct coupler apparatus for use with precast concrete segmental construction
US6874821May 7, 2002Apr 5, 2005Felix L. SorkinCoupler apparatus for use with angled post-tension cables in precast concrete segmental construction
US6889714Jul 18, 2003May 10, 2005Felix L. SorkinTendon receiving duct for a monostrand bonded post-tension system
US7621103Nov 8, 2004Nov 24, 2009Sorkin Felix LDuct system for profiled post-tension construction
US8640292May 21, 2012Feb 4, 2014Felix L. SorkinDeviator system for use in post-tension segmental concrete construction
US20110101679 *Oct 13, 2010May 5, 2011Crigler John RMethods, systems and apparatuses for segmental duct couplers
US20120298248 *May 26, 2011Nov 29, 2012Guido SchwagerTendon duct, duct connector and duct termination therefor
USD737127Feb 12, 2014Aug 25, 2015David Hong YehCoupling
USD777565 *Feb 12, 2014Jan 31, 2017David Hong YehConnector
USD783785 *Jun 30, 2015Apr 11, 2017Criser, S.A. De C.V.Drain hose
U.S. ClassificationD23/393, D23/266