US3671061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gypsum board fastener
Assignee: National Gypsum Co
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Filing: 1970-07-02
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Granted: 1972-06-20
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Expires: 1990-07-02
Abstract
Abstract Gypsum wallboard having an unbroken front face and means for affixing the wallboard to a support consisting preferably of a blind fastener extending into the body of the board through the back face, grasping the board by enlarged portions of the fastener disposed within the body of the board.
Inventors
- 👤 Jack A Dawdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/04; F16B19/08; F16B19/10; F16B19/1027; F16B19/1036; E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0803; E04F13/081; E04F13/0812; E04F13/0816; F16B5/00; F16B5/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
132 words
In combination, a paper-covered gypsum wallboard comprising a relatively crushable set gypsum interior and a relatively strong paper exterior and a metal fastener affixed thereto, said fastener affixing thereto means for mounting said wallboard, the back face of said wallboard having a hole of a predetermined size in the said paper exterior, said fastener having a portion disposed in said hole and a bent second portion disposed entirely within said interior, said bent second portion having a dimension which prevents withdrawal of said second portion through said hole, said interior having crushed set gypsum adjacent said bent section portion, said fastener having no visible elements at other surfaces of said product than at said hole, said interior also having disposed therewithin a broken-off-mandrel enlargedbottom having a drill-point on the bottom face thereof.
Claim 2
Dependent Claim
132 words
In combination, a paper-covered gypsum wallboard comprising a relatively crushable set gypsum interior and a relatively strong paper exterior and a metal fastener affixed thereto, said fastener affixing thereto means for mounting said wallboard, the back face of said wallboard having a hole of a predetermined size in the said paper exterior, said fastener having a portion disposed in said hole and a bent second portion disposed entirely within said interior, said bent second portion having a dimension which prevents withdrawal of said second portion through said hole, said interior having crushed set gypsum adjacent said bent section portion, said fastener having no visible elements at other surfaces of said product than at said hole, said interior also having disposed therewithin a broken-off-mandrel enlargedbottom having a drill-point on the bottom face thereof.
Claim 3
Dependent Claim
42 words
The combination of claim 1 wherein said fastener has an enLarged head portion and wherein at least part of said interior crushed portions are disposed between at least part of said bent second portion and at least part of said head portion.
References Cited (Backward Citations)
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Cited
US1379209A
Cited
US2090804A
Cited
US2572812A
Cited
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Cited
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Cited
US3412594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |