Patent US4271653A successfully refreshed from Google Patents.
US4271653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cladding sheets
Assignee: John Lysaght Australia Pty Ltd
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Filing: 1979-08-27
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Granted: 1981-06-09
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Expires: 1999-08-27
Abstract
Abstract To ensure positive inter-engagement of the free edge of a male rib at one side of a roof or wall cladding sheet with an internal shoulder formed in, and longitudinally of, a female rib at one side of an identical sheet, the said free edge has a series of outwardly displaced abutments formed on it so that engagement between the two is confined to those points at which the abutments are placed.
Inventors
- 👤 Peter Buchhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:37
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/361; E04D3/363
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A cladding sheet of the kind having a longitudinally-shouldered female rib formation bordering one longitudinal edge of the sheet and a male rib formation bordering the other longitudinal edge, the male rib of one sheet being designed to enter the female rib formation of another similar sheet with at least a part of the free edge of a flange forming part of said male rib lockingly engaging over the shoulder of the female rib; characterised in that said free edge has a series of spaced-apart outwardly displaced abutments formed on it to such effect that when a male rib is homed in a female rib the distal edges of the abutments engage said shoulder to the exclusion of the remainder of the flange from which the abutments are displaced.
Claim 2
Dependent Claim
129 words
A cladding sheet of the kind having a longitudinally-shouldered female rib formation bordering one longitudinal edge of the sheet and a male rib formation bordering the other longitudinal edge, the male rib of one sheet being designed to enter the female rib formation of another similar sheet with at least a part of the free edge of a flange forming part of said male rib lockingly engaging over the shoulder of the female rib; characterised in that said free edge has a series of spaced-apart outwardly displaced abutments formed on it to such effect that when a male rib is homed in a female rib the distal edges of the abutments engage said shoulder to the exclusion of the remainder of the flange from which the abutments are displaced.
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) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |