US4646498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curtain wall panel and method
Assignee: National Gypsum Co
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Filing: 1985-12-05
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Granted: 1987-03-03
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Expires: 2005-12-05
Abstract
Abstract A laminated curtain wall panel is prepared by continuously disposing foam boards onto adhesively coated gypsum sheathing followed by a third layer consisting of a reinforcing mesh and a cementitious binder, as the product progresses on a conveyor. The laminated product is erected by screws which are forced through the panel by a screw gun which disposes the screw head firmly against the gypsum sheathing.
Inventors
- 👤 Joseph W. Schneller
- 👤 Donald A. Kossuth
- 👤 J. Stephen Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:51
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/88; E04B2/90; E04B2/92
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A prefabricated laminated curtain wall panel comprising three layers, the first layer being a sheathing board, the second layer being a plastic foam insulation board and the third layer being a latex-modified Portland cement layer of about 0.016 inch thickness within which there is embedded a web of fiber glass mesh of about 0.012 inch thickness.
Claim 2
Dependent Claim
56 words
A prefabricated laminated curtain wall panel comprising three layers, the first layer being a sheathing board, the second layer being a plastic foam insulation board and the third layer being a latex-modified Portland cement layer of about 0.016 inch thickness within which there is embedded a web of fiber glass mesh of about 0.012 inch thickness.
Claim 3
Dependent Claim
39 words
A prefabricated laminated panel as defined in claim 1 wherein said sheathing board is a gypsum sheathing board of about 1/2 inch thickness, and said panel has a width and length of about four feet and eight feet, respectively.
Claim 4
Dependent Claim
41 words
A prefabricated laminated panel as defined in claim 1 wherein said sheathing board is a gypsum sheathing board of about 1/2 inch thickness which is adhesively bonded to polystyrene bead board having a thickness of about 1/2 inch to 3 inches.
Claim 5
Dependent Claim
50 words
A prefabricated laminated panel as defined in claim 1 wherein said insulation board has a taper formed along each side on the surface to which the third layer is adhered, and wherein said third layer has a substantially uniform thickness and conforms to the taper on said insulation board surface.
Claim 6
Dependent Claim
24 words
A prefabricated laminated panel as defined in claim 4 wherein said taper is about one and one-half inches wide and about 3/32 inch deep.
Claim 7
Dependent Claim
49 words
A prefabricated laminated panel as defined in claim 1 wherein said latex-modified Portland cement is formed from a slurry which comprises, by weight, about 100 parts of Portland cement, about 72 parts of fine sand and about 15 parts of an acrylic latex emulsion which is about 50% water.
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) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |