US3276177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sandwich panel with ornamental coloring feature
Assignee: Individual
•
Filing: 1963-12-18
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Granted: 1966-10-04
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Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Robert R Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:58
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/54; E04C2/543; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A STRUCTURAL PANEL COMPRISING A PLURALITY OF INDEPENDENT LADDER-LIKE GRID CORE SECTIONS DISPOSED IN COPLANAR RELATION AND SPACED APART FROM ONE ANOTHER WHEREBY TO FORM UNOBSTRUCTED PASSAGEWAYS THEREBETWEEN, EACH OF SAID INDEPENDENT SECTIONS BEING COMPRISED OF A PARALLEL PAIR OF RIGID VERTICALLY DISPOSED I-BEAM ELEMENTS INTERCONNECTED AT PREDETERMINED INTERVALS WITH SIMILARLY SHAPED HORIZONTAL I-BEAM ELEMENTS, A FIRST RIGID I-BEAM ELEMENT INTER-CONNECTING ONLY THE TOP PORTIONS OF SAID PLURALITY OF INDEPENDENT SECTIONS, AND A SECOND I-BEAM ELEMENT INTERCONNECTING ONLY THE BOTTOM END PORTIONS OF SAID INDEPENDENT SECTIONS, EACH OF SAID I-BEAM ELEMENTS BEING COMPRISED OF A WEB PORTION OF SUBSTANTIAL WIDTH AND EXTENDING THE ENTIRE LENGTH OF SAID ELEMENT AND A PAIR OF FLANGE PORTIONS ALONG OPPOSITE EDGES OF SAID FLANGE PORTION AND COEXTENSIVE WITH THE LENGTH THEREOF, A LONGITUDINAL RECESSED
Claim 2
Dependent Claim
130 words
A STRUCTURAL PANEL COMPRISING A PLURALITY OF INDEPENDENT LADDER-LIKE GRID CORE SECTIONS DISPOSED IN COPLANAR RELATION AND SPACED APART FROM ONE ANOTHER WHEREBY TO FORM UNOBSTRUCTED PASSAGEWAYS THEREBETWEEN, EACH OF SAID INDEPENDENT SECTIONS BEING COMPRISED OF A PARALLEL PAIR OF RIGID VERTICALLY DISPOSED I-BEAM ELEMENTS INTERCONNECTED AT PREDETERMINED INTERVALS WITH SIMILARLY SHAPED HORIZONTAL I-BEAM ELEMENTS, A FIRST RIGID I-BEAM ELEMENT INTER-CONNECTING ONLY THE TOP PORTIONS OF SAID PLURALITY OF INDEPENDENT SECTIONS, AND A SECOND I-BEAM ELEMENT INTERCONNECTING ONLY THE BOTTOM END PORTIONS OF SAID INDEPENDENT SECTIONS, EACH OF SAID I-BEAM ELEMENTS BEING COMPRISED OF A WEB PORTION OF SUBSTANTIAL WIDTH AND EXTENDING THE ENTIRE LENGTH OF SAID ELEMENT AND A PAIR OF FLANGE PORTIONS ALONG OPPOSITE EDGES OF SAID FLANGE PORTION AND COEXTENSIVE WITH THE LENGTH THEREOF, A LONGITUDINAL RECESSED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |