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Publication numberUSD532798 S1
Publication typeGrant
Application numberUS 29/230,985
Publication dateNov 28, 2006
Filing dateMay 28, 2005
Priority dateJun 7, 2004
Fee statusPaid
Also published asUSD519136, USD523210, USD533196
Publication number230985, 29230985, US D532798 S1, US D532798S1, US-S1-D532798, USD532798 S1, USD532798S1
InventorsRobert Alden Folk, Steven Lorne Folk
Original AssigneeVarco I/P, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Guard for derrick apparatus
US D532798 S1
Abstract  available in
Images(3)
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Claims(1)
  1. The ornamental design for a guard for derrick apparatus, as shown and described.
Description

FIG. 1 is a perspective view of a design for a guard for derrick apparatus according to the present invention.

FIG. 2 is a first side perspective view of the guard of FIG. 1.

FIG. 3 is a second side perspective view of the guard of FIG. 1, opposite to the first side.

FIG. 4 is a first side view of the guard of FIG. 1.

FIG. 5 is a second side view of the guard of FIG. 1, opposite the first side shown in FIG. 4.

FIG. 6 is a top view of the guard of FIG. 1; and,

FIG. 7 is a bottom view of the guard of FIG. 1.

Non-Patent Citations
Reference
1Advanced Permanent Magnet Motor Technology; Tesco Drilling Technology; 2 pp.; Apr. 1998.
2BJ 1986-87 Oil field Products and Systems; BJ Hughes Drilling Equipment; cover page, pp. 7, 16; 1986.
3Powerful Hydraulic Compact Top Drive Drilling System; Tesco Drilling Technology; 2 pp. Apr. 1998.
4Varco General Catalog 2002; Varco L.P.: cover page; pp. 44, 45, 56, 65; 2002.
Classifications
U.S. ClassificationD15/21
Legal Events
DateCodeEventDescription
May 23, 2011SULPSurcharge for late payment
May 23, 2011FPAYFee payment
Year of fee payment: 4
Mar 21, 2011REMIMaintenance fee reminder mailed
Sep 19, 2005ASAssignment
Owner name: ADVANCED MICRO DEVICES, INC., CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YOU, LU;WANG, FEI;TRAN, MINH QUOC;AND OTHERS;REEL/FRAME:017024/0338;SIGNING DATES FROM 20050916 TO 20050919