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US3568381A Expired / Lapsed US ⏱️ 0.0 years remaining

Structural system utilizing membrane structural panels having double ruled quadric surfaces

Assignee: Individual
•
Filing: 1968-11-27
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Granted: 1971-03-09
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Expires: 1988-11-27
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Abstract

Abstract A BASIC STRUCTURAL ELEMENT IS FORMED FROM A WARPED MEMBRANE STRUCTURAL PANEL HAVING DOUBLE RULED QUADRIC SURFACES. THE DOUBLE RULED QUARDIC SURFACES OF THE PANEL HAVE BIAXIALLY ORIENTED SURFACE RULINGS, THE EDGES OF A PREFERRED EMBODIMENT OF THE PANEL LYING IN PLANES PARALLEL TO ONE OR THE OTHER OF THE SETS OF RULINGS. THE MEMBRANE PANEL HAS FOUR EDGES, PAIRS OF WHICH ARE EQUAL IN LENGTH. IN SOME CASE, THE WARPED PANEL MAY BE ENCLOSED IN A PANEL SURFACED TETRAHEDRAL ENVELOPE, THE EDGES OF THE PLANE SURFACES BEING JOINED TO THE EDGES OF THE ENCLOSED WARPED SURFACES. BASIC STRUCTURAL ELEMENTS FORMED BY THE WARPED MEMBRANE PANELS, EITHER BY THEMSELVES OR IN COMBINATION WITH THE PLANE SURFACED TETRAHEDRAL ENVELOPE, MAY BE ADDED TOGETHER TO FORM VARIOUS COMPOSITE MODULES WHICH CAN BE FURTHER INTEGRATED TO CREATE STRUCTURES USEFUL AS PANELS, POSTS, BEAMS, AND THE LIKE.

Inventors

  • 👤 Jesse R Hale

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 16:57
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04B7/10; E04B7/102; E04B1/00; E04B1/32; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/326; E04B2001/327; Y; Y10; Y10S; Y10S52/00; Y10S52/10

Claims Analysis

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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-03-08 1974-09-07 1975-03-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-03-08 1978-09-07 1979-03-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-03-08 1982-09-07 1983-03-09 $7700.00 Window Closed / Lapsed

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