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US3733231A
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US
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Wallboard attachment
Assignee: National Gypsum Co
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Filing: 1971-06-16
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Granted: 1973-05-15
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Expires: 1991-06-16
Abstract
Abstract WALLBOARD AFFIXED TO STUDS OR TRUSSES BY A STRIP OF METAL FOIL WITH HOT MELT ADHESIVE ON BOTH SURFACES, DISPOSED BETWEEN THE BOARD AND THE FRAMING MEMBER AND HELD THERE FIRMLY WHILE HEATING THE FOIL WITH AN ELECTRIC CURRENT.
Inventors
- 👤 E Rutkowski
- 👤 J Schneller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:42
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/22; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0803; E04F13/0885; E04F13/0887; E04F13/14; E04F13/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |