Patent US3698879A successfully refreshed from Google Patents.
US3698879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chevron shaped article and a sandwich structure therefrom
Assignee: Marc Wood Sa Pour La Promotion Des Echanges Techniques Internationaux
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Filing: 1955-06-09
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Granted: 1972-10-17
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Expires: 1975-06-09
Abstract
Abstract 1. A STRUCTURAL ELEMENT COMPRISING A SANDWICH OF TWO COVER SHEETS AND AN INTERPOSED CORE SHEET INTEGRALLY SECURED WITH THE COVER SHEETS, SAID CORE SHEET BEING CORRUGATED WITH THE CORRUGATIONS EXTENDING IN ZIG-ZAG PARALLEL ROWS AND EACH CORRUGATION HAVING A CREST RIDGE SECURED TO ONE COVER SHEET AND A VALLEY RIDGE SECURED TO THE OTHER COVER SHEET, SAID RIDGES TERMINATING IN A PEAKED EDGE SO THAT THE CORE SHEET CAN BE FORMED BY FOLDING FROM A FLAT SHEET WITHOUT STRETCHING THE MATERIAL, AND SAID CORRUGATIONS HAVING INCLINED PLANER SIDE WALLS BETWEEN THE CREST AND VALLEY RIDGES.
Inventors
- 👤 Victor Gewiss Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:38
CPC Classifications
B; B21; B21D; B21D47/00; B21D13/00; B21D13/02; B29; B29C; B29C53/00; B29C53/22; B31; B31D; B31D3/00; B31D3/005; E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/326; E04C2/34; E04C2/3405; E04C2002/3444; E04C2002/345; E04C2002/3494; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/1241; Y10T428/12417; Y10T428/12479; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A STRUCTURAL ELEMENT COMPRISING A SANDWICH OF TWO COVER SHEETS AND AN INTERPOSED CORE SHEET INTEGRALLY SECURED WITH THE COVER SHEETS, SAID CORE SHEET BEING CORRUGATED WITH THE CORRUGATIONS EXTENDING IN ZIG-ZAG PARALLEL ROWS AND EACH CORRUGATION HAVING A CREST RIDGE SECURED TO ONE COVER SHEET AND A VALLEY RIDGE SECURED TO THE OTHER COVER SHEET, SAID RIDGES TERMINATING IN A PEAKED EDGE SO THAT THE CORE SHEET CAN BE FORMED BY FOLDING FROM A FLAT SHEET WITHOUT STRETCHING THE MATERIAL, AND SAID CORRUGATIONS HAVING INCLINED PLANER SIDE WALLS BETWEEN THE CREST AND VALLEY RIDGES.
Claim 2
Dependent Claim
95 words
A STRUCTURAL ELEMENT COMPRISING A SANDWICH OF TWO COVER SHEETS AND AN INTERPOSED CORE SHEET INTEGRALLY SECURED WITH THE COVER SHEETS, SAID CORE SHEET BEING CORRUGATED WITH THE CORRUGATIONS EXTENDING IN ZIG-ZAG PARALLEL ROWS AND EACH CORRUGATION HAVING A CREST RIDGE SECURED TO ONE COVER SHEET AND A VALLEY RIDGE SECURED TO THE OTHER COVER SHEET, SAID RIDGES TERMINATING IN A PEAKED EDGE SO THAT THE CORE SHEET CAN BE FORMED BY FOLDING FROM A FLAT SHEET WITHOUT STRETCHING THE MATERIAL, AND SAID CORRUGATIONS HAVING INCLINED PLANER SIDE WALLS BETWEEN THE CREST AND VALLEY RIDGES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |