Title:
Step ladder
Document Type and Number:
United States Patent D840055

Inventors:
Skubic, Jeff D. (Eden Prairie, MN, US)
Simpson, Dennis D. (Plymouth, MN, US)
Williams, Benjamin P. (Chaska, MN, US)
Lu, Yongxue (Shanghai, CN)
Application Number:
29/633324
Publication Date:
02/05/2019
Filing Date:
01/12/2018
View Patent Images:
Assignee:
Tricam Industries, Inc. (Eden Prairie, MN, US)
Primary Class:
International Classes:
(IPC1-7): 2504
Field of Search:
D25/62-65, D25/68, D25/69, 182/121, 182/23, 182/172, 182/125, 182/116, 182/122, 182/102, 182/96, 182/28, 182/27, 182/46, 182/20, 182/22, 182/26, 182/228.2, 182/222, 182/33, 182/129, 182/200, 182/156, 182/127, 182/120, 182/228.3, 182/104, 182/168, 182/206, 182/13, 182/33.3, 182/201, 182/106, 182/24, 182/25, 182/29, 182/117, 182/216, 182/124, 182/163, 182/161, 182/165, 182/180.1, 182/170
US Patent References:
D777350Ladder2017-01-24MossD25/64
D766461Ladder2016-09-13MossD25/64
D766462Ladder2016-09-13MossD25/64
20150308190STEP LADDER2015-10-29Skubic et al.
20150159434HINGED CONNECTION ELEMENT OF A FOLDING LADDER2015-06-11Leng
8997931Stepladder with latch stud and method2015-04-07Parker et al.
20150090533STEP LADDERS, COMPONENTS FOR STEP LADDERS AND RELATED METHODS2015-04-02Moss182/180.1
20140332316Stepladder Having a Ladder Top with Conduit Holder Slot and Method2014-11-13Tiber182/129
20141022458N/AAugust, 2014Russell et al.
20140102458N/A2014-04-17
20110024234Ladder Chair2011-02-03Lin
7861826Platform for a ladder2011-01-04Meyers et al.
20070284192FOLDING TRAY FOR FOLDABLE STEP STOOL2007-12-13Meyers et al.
D554771Stepladder2007-11-06Skubic et al.
20070181369FOLDABLE STEPLADDER WITH STEP LOCK2007-08-09Gibson et al.
D548364Stepladder2007-08-07SkubicD25/64
7204343Collapsible platform for maintenance tasks2007-04-17Seaman
7108103Rigidified step ladder2006-09-19Meeker
20040007424Stepladder with pivoting utility tray2004-01-15Simpson
20040000449Step stool with movable handrail2004-01-01Meeker
6550579Step stool2003-04-22Gibson et al.
6427805Folding step stool2002-08-06Gibson et al.
6390238Foldable step stool with leg lock and handle2002-05-21Gibson et al.
6347687Compact collapsible step ladder2002-02-19Alim
20020017431Foldable step stool with leg lock and handle2002-02-14Gibson et al.
6012548Ladder frame2000-01-11Kim
4270463Display stand with easily adjusted shelves1981-06-02Korzon
3446310SCAFFOLADDER,DECORATOR MODEL1969-05-27Alfie
2899008Multi-way ladder1959-08-11Larson182/116
2650014Stepladder1953-08-25Harrison
2470053Convertible stepladder1949-05-10Salisbury182/120
Foreign References:
AU2007101150A42008-01-10Step ladder/scaffold platform assembly
FR2777593A11999-10-22PERFECTIONNEMENTS AUX ESCABEAUX A USAGE MENAGER OU PROFESSIONNEL
FR2816984A12002-05-24ESCABEAU PLATE-FORME DE GRANDE LARGEUR A POSITIONNEMENT RAPIDE SUR TOUS TERRAINS
WO2010084135A12010-07-29A LADDER
Other References:
PolderĀ® 3-Step Ladder. Crate and Barrel, http://www.crateandbarrel.com/polder-3-step-ladder/s451498, accessed May 6, 2015.
Cosco Signature Series 6 ft. Premium Aluminum Step Ladder, Home Depot, http://www.homedepot.com/p/Cosco-Signature-Series-6-ft-Premium-Aluminum-Step-Ladder-2061AABLD/203642157, accessed May 6, 2015.
Werner 4 ft. Fiberglass Platform Step Ladder with 375 lb. Load Capacity Type IAA Duty Rating. Home Depot, http://www.homedepot.com/p/Werner-4-ft-Fiberglass-Platform-Step-Ladder-with-375-lb-Load-Capacity-Type-IAA-Duty-Rating-P7404/203134335, accessed May 6, 2015.
Application and File History from U.S. Appl. No. 14/617,441, filed Feb. 9, 2015, inventors Skubic et al.
Primary Examiner:
Ramirez, Cynthia
Assistant Examiner:
Colan, Gino
Attorney, Agent or Firm:
Patterson Thuente Pedersen, P.A.
Claims:
CLAIM

1. We claim the ornamental design for step ladder, as shown and described.

Description:

FIG. 1 is a front perspective view of a step ladder.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a right side elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a top plan view thereof.

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear perspective view thereof.

The dashed broken lines in the drawings depict portions of the step ladder that form no part of the claimed design.