Patent EP0140981A1 successfully refreshed from Google Patents.
US2797447A
Expired / Lapsed
US
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Panel construction
Assignee: NAT PLASTIC PRODUCTS Co
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Filing: 1952-12-31
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Granted: 1957-07-02
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Expires: 1972-12-31
Abstract
No abstract record available.
Inventors
- 👤 Winer Ephraim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:59
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/70; E06B3/88; A; A47; A47B; A47B13/00; A47B13/08; E06B3/82; E06B3/86; A47B2200/00; A47B2200/0001; A47B2200/001; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/236; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A PANEL CONSTRUCTION, A MOLDED CORE FORMED OF A THERMOPLASTIC MATERIAL, SAID CORE INCLUDING A BASE AND A PLURALITY OF WALLS MOLDED INTEGRAL WITH SAID BASE AND LOCATED IN PERPENDICULAR RELATION WITH RESPECT THERETO, SAID BASE AND WALLS THEREBY FORMING A LIGHT-WEIGHT CELLULAR STRUCTURE , A SLOT FORMED IN THE EDGE OF SAID CELLULAR CORE, AN EDGING EXTENDING AROUND THE PERIPHERY OF SAID CELLULAR CORE AND HAVING AN ADHESIVE APPLIED THERETO, SAID EDGING BEING POSITIONED IN SAID SLOT AND FIRMLY SECURED THEREIN BY SAID ADHESIVE, AND AN OUTER SHEET OF LAMINATED THERMOSETTING MATERIAL POSITIONED ON SAID CELLULAR CORE AND SECURED TO THE OUTER EDGES OF SAID WALLS, THEREBY FORMING AN OUTER SURFACE OF SAID PANEL CONSTRUCTION.
Claim 2
Dependent Claim
117 words
IN A PANEL CONSTRUCTION, A MOLDED CORE FORMED OF A THERMOPLASTIC MATERIAL, SAID CORE INCLUDING A BASE AND A PLURALITY OF WALLS MOLDED INTEGRAL WITH SAID BASE AND LOCATED IN PERPENDICULAR RELATION WITH RESPECT THERETO, SAID BASE AND WALLS THEREBY FORMING A LIGHT-WEIGHT CELLULAR STRUCTURE , A SLOT FORMED IN THE EDGE OF SAID CELLULAR CORE, AN EDGING EXTENDING AROUND THE PERIPHERY OF SAID CELLULAR CORE AND HAVING AN ADHESIVE APPLIED THERETO, SAID EDGING BEING POSITIONED IN SAID SLOT AND FIRMLY SECURED THEREIN BY SAID ADHESIVE, AND AN OUTER SHEET OF LAMINATED THERMOSETTING MATERIAL POSITIONED ON SAID CELLULAR CORE AND SECURED TO THE OUTER EDGES OF SAID WALLS, THEREBY FORMING AN OUTER SURFACE OF SAID PANEL CONSTRUCTION.
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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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |