Patent US3714747A successfully refreshed from Google Patents.
US3714747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastening means for double-skin foam core building panel
Assignee: Robertson Co H H
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Filing: 1971-08-23
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Granted: 1973-02-06
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Expires: 1991-08-23
Abstract
Abstract A DOUBLE-SKIN FOAM CORE BUILDING PANEL PRESENTING AN INBOARD SIDE SEGMENT ALONG ONE SIDE AND AN OUTBOARD SLIDE SEGMENT ALONG ITS OPPOSITE SIDE-THE SIDE SEGMENTS BEING ADAPTED TO BE ASSEMBLED IN LAPPED INTERFITTED RELATION WITHOUT EXTERNALLY VISIBLE FASTENERS. HIDDEN FASTENING MEANS IN THE FORM OF A CLIP AND FASTENER IS PROVIDED FOR SECURING THE INBOARD SIDE SEGMENT OF THE PANEL TO THE SUBGIRT OF A STRUCTURAL FRAMEWORK. D R A W I N G
Inventors
- 👤 B Curran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:17
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0832; E04F13/0833; E04F13/0835; E04F13/0837; E04B; E04B2/00; E04B2/56
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |