US3449879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building panel with foam layer and methods of connecting and attaching the panel
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1966-09-12
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Granted: 1969-06-17
•
Expires: 1986-09-12
Abstract
No abstract record available.
Inventors
- 👤 Martin S Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:09
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043; E04B; E04B1/00; E04B1/02; E04B1/04; E04C2/26; E04C2/284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A LAMINATED BUILDING PANEL COMPRISING: A CAST GYPSUM PANEL; AN OUTER LAYER OF WEATHERING MATERIAL; MEANS BONDING SAID LAYER TO SAID PANEL AND INCLUDING AN INTERMEDIATE LAYER OF A FOAMED ORGANIC POLYMER; AND MEANS FOR RENDERING SAID PANEL LOAD-BEARING AND INCLUDING THE PROVISION IN SAID PANEL OF INTERNAL METAL REINFORCING MEANS, SAID GYPSUM PANEL BEING TONGUED AND GROOVED ALONG AT LEAST TWO OF ITS EDGES, AND THE FOAMED ORGANIC POLYMER LAYER AND THE OUTER LAYER BEING REBATED WITH RESPECT TO THE GYPSUM.
Claim 2
Dependent Claim
82 words
A LAMINATED BUILDING PANEL COMPRISING: A CAST GYPSUM PANEL; AN OUTER LAYER OF WEATHERING MATERIAL; MEANS BONDING SAID LAYER TO SAID PANEL AND INCLUDING AN INTERMEDIATE LAYER OF A FOAMED ORGANIC POLYMER; AND MEANS FOR RENDERING SAID PANEL LOAD-BEARING AND INCLUDING THE PROVISION IN SAID PANEL OF INTERNAL METAL REINFORCING MEANS, SAID GYPSUM PANEL BEING TONGUED AND GROOVED ALONG AT LEAST TWO OF ITS EDGES, AND THE FOAMED ORGANIC POLYMER LAYER AND THE OUTER LAYER BEING REBATED WITH RESPECT TO THE GYPSUM.
References Cited (Backward Citations)
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Cited
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Cited
US3295278A
Cited
US3303617A
Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |