US3223576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous panels impregnated with foam plastic
Assignee: National Gypsum Co
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Filing: 1961-08-11
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Granted: 1965-12-14
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Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
- 👤 Robert E Evans
- 👤 William L Prior
- 👤 Aubrey V Baber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:05
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/249921; Y10T428/249953; Y10T428/249961; Y10T428/249994; Y10T428/249999; Y10T428/4935; Y10T428/662; Y10T442/00; Y10T442/60; Y10T442/647; Y10T442/652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A STRUCTURAL BUILDING PANEL CONSISTING ESSENTIALLY OF A RIGID FIBROUS BOARD COMPOSED OF A NETWORD OF FILAMENTARY MATERIAL BONDED TOGETHER IN SHEET FORM BY MEANS OF AN INORGANIC CEMENTITIOUS BINDER AND CHARACTERIZED BY A MULTIPLICITY OF PASSAGEWAYS AND INTERSTICES EXTENDING INWARDLY FROM THE EXPOSED SURFACES OF THE BOARD THROUGHOUT THE ENTIRE THICKNESS THEREOF, THE PASSAGEWAYS AND INTERSTICES INSAID FIBROUS BOARD BEING FILLED AND CLOSED BY AN ESSENTIALLY RIGID FOAMED PLASTIC MATERIAL CHARACTERIZED BY HAVING BEEN FOAMED IN SITU, SAID FOAMED PLASTIC MATERIAL ADDITIONALLY DEFINING AN INTEGRAL FOAM PLASTIC LAYER COVERING AND SEALING AT LEAST ONE FACE OF SAID FIBROUS BOARD, SAID LAYER HAVING A CAST FOAM SURFACE.
Claim 2
Dependent Claim
107 words
A STRUCTURAL BUILDING PANEL CONSISTING ESSENTIALLY OF A RIGID FIBROUS BOARD COMPOSED OF A NETWORD OF FILAMENTARY MATERIAL BONDED TOGETHER IN SHEET FORM BY MEANS OF AN INORGANIC CEMENTITIOUS BINDER AND CHARACTERIZED BY A MULTIPLICITY OF PASSAGEWAYS AND INTERSTICES EXTENDING INWARDLY FROM THE EXPOSED SURFACES OF THE BOARD THROUGHOUT THE ENTIRE THICKNESS THEREOF, THE PASSAGEWAYS AND INTERSTICES INSAID FIBROUS BOARD BEING FILLED AND CLOSED BY AN ESSENTIALLY RIGID FOAMED PLASTIC MATERIAL CHARACTERIZED BY HAVING BEEN FOAMED IN SITU, SAID FOAMED PLASTIC MATERIAL ADDITIONALLY DEFINING AN INTEGRAL FOAM PLASTIC LAYER COVERING AND SEALING AT LEAST ONE FACE OF SAID FIBROUS BOARD, SAID LAYER HAVING A CAST FOAM SURFACE.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |