US3646715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated building panel
Assignee: PAN-BRICK Inc
•
Filing: 1970-04-06
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Granted: 1972-03-07
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Expires: 1990-04-06
Abstract
Abstract A prefabricated building panel having a layer of cellular plastic such as polyurethane foam, to one face of which are bonded bricklike facing elements spaced from one another. A granular material, such as sand, is adhered to and embedded in the cellular plastic between the facing elements to give the appearance of mortar between the facing elements.
Inventors
- 👤 Kenneth W Pope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:42
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/326; B29C44/02; B29C44/12; B29C44/1228; B29C44/1233; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; E04C2/26; E04C2/284; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0862; E04F13/14; E04F13/15
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
A prefabricated building panel as claimed in claim 1, in which the cellular plastic is foamed polyurethane.
Claim 2
Dependent Claim
20 words
A prefabricated building panel as claimed in claim 1, in which the facing elements are partly embedded in said layer.
Claim 3
Dependent Claim
46 words
A prefabricated building panel as claimed in claim 3, in which the granular material is sand and in which the facing elements are uniform and resemble conventional bricks, whereby to give to the panel the appearance of a conventional brick wall with mortar between adjacent bricks.
Claim 4
Dependent Claim
27 words
A prefabricated building panel as claimed in claim 1, in which a rigid backing sheet is secured to the other face of said layer of cellular plastic.
Claim 5
Dependent Claim
17 words
A prefabricated building panel as claimed in claim 5, in which said rigid backing sheet is plywood.
Claim 6
Dependent Claim
36 words
A prefabricated building panel as claimed in claim 4, in which the cellular plastic is foamed polyurethane, and in which a rigid backing sheet is secured to the other face of said layer of cellular plastic.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |