US3731447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wallboard attachment
Assignee: National Gypsum Co
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Filing: 1972-02-25
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Granted: 1973-05-08
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Expires: 1992-02-25
Abstract
Abstract An elongate rigid plastic extrusion, adhered to the back face of gypsum wallboard along the vertical edges, with an elongate tubular portion, projecting rearwardly, lockingly engaged in a plurality of spring clips which are clipped onto the two opposite faces of a steel stud.
Inventors
- 👤 J Dawdy
- 👤 D Hamme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:51
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/76; E04B2/78; E04B2/7854; E04B2002/7461; E04B2002/7462
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A demountable wall construction comprising a plurality of spaced, parallel wall supporting studs, said studs each having a pair of opposed faces to which wallboard is affixed thereby forming two opposed wall surfaces, said wallboard having elongate support strips adhered to the back face of said wallboard, said studs having a plurality of clips affixed thereto at spaced positions therealong, said clips having outwardly opening slots, said support strips having a rearwardly disposed elongate tubular portions, said tubular portions being disposed within said slots of said plurality of clips, said slots having a cross-sectional configuration including an outwardly opening portion of a dimension less than the maximum width of said tubular portion disposed within said slot, whereby said wallboard is held adjacent said studs on each side thereof.
Claim 2
Dependent Claim
128 words
A demountable wall construction comprising a plurality of spaced, parallel wall supporting studs, said studs each having a pair of opposed faces to which wallboard is affixed thereby forming two opposed wall surfaces, said wallboard having elongate support strips adhered to the back face of said wallboard, said studs having a plurality of clips affixed thereto at spaced positions therealong, said clips having outwardly opening slots, said support strips having a rearwardly disposed elongate tubular portions, said tubular portions being disposed within said slots of said plurality of clips, said slots having a cross-sectional configuration including an outwardly opening portion of a dimension less than the maximum width of said tubular portion disposed within said slot, whereby said wallboard is held adjacent said studs on each side thereof.
Claim 3
Dependent Claim
75 words
A demountable wall construction as defined in claim 1 wherein said clips have a pair of slots disposed one on each end of said clips, said slots on one end of a plurality of clips holding therein a tubular portion of a support strip on one piece of wallboard, said slots on the other end of said plurality of clips holding therein a tubular portion of a support strip on an adjacent piece of wallboard.
Claim 4
Dependent Claim
62 words
A demountable wall construction as defined in claim 2 wherein said support strips include a base portion, said base portion of each said support strip being adhered to the back face of one of said wallboards, said base portion of each said support strip having one side disposed coplanar with the side edge of the said wallboard to which it is adhered.
Claim 5
Dependent Claim
41 words
A demountable partition as defined in claim 1 wherein said slots have a cross-section which forms the major portion of a circle, said tubular portion being of a circular cross-section substantially equal in diameter to the inside diameter of said slots.
Claim 6
Dependent Claim
65 words
A demountable partition as defined in claim 1 wherein said studs have a web and a pair of flanges, said web having a plurality of openings, said clips each having two U-bend portions opening towards one another, one said U-bend portion being disposed about the edge of one of said stud flanges, the other of said U-bend portions extending through one of said web openings.
Claim 7
Dependent Claim
23 words
A demountable partition as defined in claim 1 wherein said clips are formed from spring steel and said support strips are plastic extrusions.
Claim 8
Dependent Claim
28 words
A demountable partition as defined in claim 1 wherein said clips are short sections of a relatively rigid plastic extrusion and said support strips are long plastic extrusions.
Claim 9
Dependent Claim
62 words
A demountable partition as defined in claim 1 wherein said support strips are plastic extrusions including a base portion and a rearwardly protruding tubular portion, said base portion being substantially wider than the diameter of said tubular portion and having one edge coplanar with the wallboard edge, said tubular portion being centered relative to the two side edges of said base portion.
Claim 10
Dependent Claim
40 words
A demountable partition as defined in claim 8 wherein said wallboards are each about two feet wide and each has only two said support strips, said support strips being adhered to two opposite edge portions of the wallboard back face.
Claim 11
Dependent Claim
65 words
A demountable partition as defined in claim 9 wherein said studs have a web and a pair of flanges, said web having a plurality of openings, said clips each having two U-bend portions opening towards one another, one said U-bend portion being disposed about the edge of one of said stud flanges, the other of said U-bend portions extending through one of said web openings.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |