US4704837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall construction
Assignee: National Gypsum Properties LLC
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Filing: 1986-08-15
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Granted: 1987-11-10
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Expires: 2006-08-15
Abstract
Abstract A wall construction wherein a sheet of paper covered gypsum wallboard has at least one V-shaped groove formed part way through the thickness of the wallboard, and a sheet of rigid bendable sheet metal, conforming to one surface of the wallboard, along the groove area, is laminated to the wallboard whereby folding of the wallboard and sheet metal, along the groove, closing the groove, results in a folded section which remains firmly folded by reason of the folded rigid sheet metal laminate.
Inventors
- 👤 Robert J. Menchetti
- 👤 Robert M. Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:10
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/40; E04B; E04B2/00; E04B2/72; E04B2/723; E04C2/02; E04C2/04; E04C2/043; E04C2/405; E04B2002/725
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
155 words
A wall panel unit comprising a single piece, paper covered gypsum wallboard having spaced grooves and, laminated thereto, a sheet of bendable rigid sheet metal in the area of each said groove, said grooves having a V-shape of an angle of about 100° and being parallel to and located about three inches from each longitudinal edge of said wallboard, said grooves having a depth equal to the thickness of one layer of paper plus the thickness of the gypsum core, and said laminated sheet metal being disposed on said wallboard in the areas of said grooves and being shaped to substantially conform to the abutting surface of said wallboard to which said sheet metal is laminated, whereby said wallboard and said metal may be simultaneously bent to substantially close said groove and to remain bent while free of any adhesive in said groove by said rigid bent sheet metal which is laminated to said wallboard.
Claim 2
Dependent Claim
155 words
A wall panel unit comprising a single piece, paper covered gypsum wallboard having spaced grooves and, laminated thereto, a sheet of bendable rigid sheet metal in the area of each said groove, said grooves having a V-shape of an angle of about 100° and being parallel to and located about three inches from each longitudinal edge of said wallboard, said grooves having a depth equal to the thickness of one layer of paper plus the thickness of the gypsum core, and said laminated sheet metal being disposed on said wallboard in the areas of said grooves and being shaped to substantially conform to the abutting surface of said wallboard to which said sheet metal is laminated, whereby said wallboard and said metal may be simultaneously bent to substantially close said groove and to remain bent while free of any adhesive in said groove by said rigid bent sheet metal which is laminated to said wallboard.
Claim 3
Dependent Claim
65 words
A wall panel unit as defined in claim 1 wherein said sheet metal is in the form of a narrow sheet metal fold retainer and is laminated to the side of said wallboard which is grooved with said sheet metal fold retainer being shaped to extend into said groove to a depth close to, but not contacting, the paper at the bottom of said groove.
Claim 4
Dependent Claim
74 words
A wall panel unit as defined in claim 2 wherein there are two said sheet metal fold retainers each having a width extending from the area of one edge of said wallboard across the area of an adjacent groove and onto an area of ungrooved wallboard on the side of said groove remote from said edge, and said sheet metal fold retainers are firmly bonded to said wallboard on both sides of said grooves.
Claim 5
Dependent Claim
28 words
A wall panel unit as defined in claim 3 wherein each said sheet metal fold retainer has a narrow end flange adhered to an edge of said wallboard.
Claim 6
Dependent Claim
21 words
A wall panel unit as defined in claim 3 wherein said sheet metal fold retainers are each about five inches wide.
Claim 7
Dependent Claim
28 words
A wall panel unit as defined in claim 1 wherein said sheet metal is laminated to the side of said wallboard opposite to the side which is grooved.
Claim 8
Dependent Claim
28 words
A wall panel unit as defined in claim 6 wherein said sheet metal extends substantially throughout said side of said wallboard opposite to the side which is grooved.
Claim 9
Dependent Claim
27 words
A wall panel unit as defined in claim 7 wherein said sheet metal includes a short flange on each side extending onto the edge of said wallboard.
Claim 10
Dependent Claim
94 words
A wall comprising a plurality of folded wall panel units formed by folding the unfolded wall panel units defined in claim 1, said folded wall panel units having two narrow sections about three inches wide and a central section extending therebetween of a width of about 10 to 50 inches, said narrow sections extending perpendicularly from the two side of said central section and abutting the inner face of oppositely facing folded wall panel units, whereby a studless hollow wall is formed with a thickness equal to about three inches plus the wallboard thickness.
Claim 11
Dependent Claim
20 words
A wall as defined in claim 9 wherein said central section has a width of about 24 to 30 inches.
Claim 12
Dependent Claim
148 words
A wall termination unit comprising a single piece, paper covered gypsum wallboard having spaced grooves and, laminated thereto, a sheet of bendable rigid sheet metal in the area of each said groove, said grooves having a V-shape of an angle of about 100° and being parallel and about three inches apart, said grooves having a depth equal to the thickness of one layer of paper plus the thickness of the gypsum core, and said laminated sheet metal being disposed on said wallboard in the areas of said grooves and being shaped to substantially conform to the abutting surface of said wallboard to which said sheet metal is laminated, whereby said wallboard and said sheet metal may be simultaneously bent to substantially close said groove and to remain bent while free of any adhesive in said groove by said rigid bent sheet metal which is laminated to said wallboard.
Claim 13
Dependent Claim
148 words
A wall termination unit comprising a single piece, paper covered gypsum wallboard having spaced grooves and, laminated thereto, a sheet of bendable rigid sheet metal in the area of each said groove, said grooves having a V-shape of an angle of about 100° and being parallel and about three inches apart, said grooves having a depth equal to the thickness of one layer of paper plus the thickness of the gypsum core, and said laminated sheet metal being disposed on said wallboard in the areas of said grooves and being shaped to substantially conform to the abutting surface of said wallboard to which said sheet metal is laminated, whereby said wallboard and said sheet metal may be simultaneously bent to substantially close said groove and to remain bent while free of any adhesive in said groove by said rigid bent sheet metal which is laminated to said wallboard.
Claim 14
Dependent Claim
140 words
A wall corner unit comprising a single piece, paper covered gypsum wallboard having a groove and, laminated thereto, a sheet of bendable rigid sheet metal in the area of said groove, said groove having a V-shape of an angle of about 100° , said groove having a depth equal to the thickness of one layer of paper plus the thickness of the gypsum core, and said laminated sheet metal being disposed on said wallboard in the area of said groove and being shaped to substantially conform to the abutting surface of said wallboard to which said sheet metal is laminated, whereby said wallboard and said sheet metal may be simultaneously bent to substantially close said groove and to remain bent while free of any adhesive in said groove by said rigid bent sheet metal which is laminated to said wallboard.
Claim 15
Dependent Claim
140 words
A wall corner unit comprising a single piece, paper covered gypsum wallboard having a groove and, laminated thereto, a sheet of bendable rigid sheet metal in the area of said groove, said groove having a V-shape of an angle of about 100° , said groove having a depth equal to the thickness of one layer of paper plus the thickness of the gypsum core, and said laminated sheet metal being disposed on said wallboard in the area of said groove and being shaped to substantially conform to the abutting surface of said wallboard to which said sheet metal is laminated, whereby said wallboard and said sheet metal may be simultaneously bent to substantially close said groove and to remain bent while free of any adhesive in said groove by said rigid bent sheet metal which is laminated to said wallboard.
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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) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |