Frameless umbrella and canopy

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5421354
SERIAL NO

08082746

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A self-supporting umbrella canopy has a high strength-to-weight ratio and the ability to compactly fold flat. The umbrella canopy uses a series of collapsible, closed cross-section cells to provide its support and to provide weather protection for a person or persons below. The closed cross-section cells are attached to each other in series so that the umbrella canopy may conveniently unfurl in a radial manner. Construction of the umbrella canopy lends itself to automated processes. Due to the self-supporting nature of the collapsible, closed cross-section cells, lightweight and inexpensive waterproof materials may be used to construct the umbrella canopy.

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First Claim

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Patent Owner(s)

  • Assignment data not available. Check PTO

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bolton, Douglas A 310 S. Jefferson, #25C, Placentia, CA 92670 4 47

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (3)
* 4643210 Inflatable umbrella 15 1985
* 4870983 Inflating article with integrally associated pump 11 1988
* 5103848 Sunshade umbrella 6 1990
 
HUNTER DOUGLAS INDUSTRIES B.V. (1)
* 5197526 Device for the internal shading of glass areas with a hanging means 16 1990
 
Hunter Douglas Inc. (1)
* 5043039 Method of manufacture of expandable and collapsible cellular shades of sheer fabric 29 1990
 
INTERNATIONAL WINDOW FASHIONS LLC (1)
* 5188160 Honeycombed shade 21 1992
 
Desaleux; Jean (1)
* 4370993 Disposable umbrella 5 1981
 
COMFORTEX CORPORATION (1)
* 4934434 Suspension and actuation systems for specialty window shades 29 1989
 
SCHON B.V. (1)
* 5078195 Double-walled pleated curtain 26 1990
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (2)
* 5682915 Portable sun screen 5 1996
D437109 Umbrella 16 2000
 
LEIDOS, INC. (2)
* 9051918 Vertical axis wind turbine with tensile support structure having rigid or collapsible vanes 1 2011
9133815 Propeller-type double helix turbine apparatus and method 0 2011
 
FU TAI UMBRELLA WORKS, LTD. (1)
* 6302125 Simplified flat top umbrella with one-piece umbrella cloth 10 2000
* Cited By Examiner