Patent US4020612A successfully refreshed from Google Patents.
US4020612A
Expired / Lapsed
US
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Lintel structure
Assignee: SMITH PIPE AND STEEL Co
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Filing: 1974-10-21
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Granted: 1977-05-03
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Expires: 1994-10-21
Abstract
Abstract A lintel fabricated of an elongated lightweight metal plate having rigidifying beam means affixed thereto and extending longitudinally thereof.
Inventors
- 👤 William T. Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:36
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C2003/023
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
57 words
A lintel structure comprising: a. an elongated flat plate; and b. an elongated rigidifying one piece tubular beam of unitary endless cross section fixedly attached to one of the planar surfaces of said elongated flat plate, said elongated rigidifying tubular beam means disposed to extend longitudinally on said elongated flat plate intermediate the opposite longitudinal edges thereof.
Claim 2
Dependent Claim
57 words
A lintel structure comprising: a. an elongated flat plate; and b. an elongated rigidifying one piece tubular beam of unitary endless cross section fixedly attached to one of the planar surfaces of said elongated flat plate, said elongated rigidifying tubular beam means disposed to extend longitudinally on said elongated flat plate intermediate the opposite longitudinal edges thereof.
Claim 3
Dependent Claim
57 words
A lintel structure as claimed in claim 1 wherein said elongated rigidifying one piece tubular beam means has a width dimension which is less than the width dimension of said elongated plate to expose a portion of the planar surface of said elongated flat plate on each of the opposite sides of said rigidifying tubular beam means.
Claim 4
Dependent Claim
76 words
A lintel structure as claimed in claim 1 wherein said elongated rigidifying one piece tubular beam means has a width dimension which is less than the width dimension of said elongated plate to expose a portion of the planar surface of said elongated flat plate on each of the opposite sides of said rigidifying tubular beam means, each of the exposed portions being at least one third of the planar surface of said elongated flat plate.
Claim 5
Dependent Claim
27 words
A lintel structure as claimed in claim 1 wherein said elongated rigidifying one piece tubular beam means is a tubular member of box shaped cross sectional configuration.
Claim 6
Dependent Claim
26 words
A lintel structure as claimed in claim 1 wherein said elongated rigidifying one piece tubular beam means is a tubular beam of square cross sectional configuration.
Claim 7
Dependent Claim
49 words
A lintel structure as claimed in claim 1 wherein said elongated rigidifying one piece tubular beam means is a tubular beam of square cross sectional configuration with one of the surfaces thereof in coextending parallel contiguous engagement with the planar surface of said elongated flat plate and affixed thereto.
Claim 8
Dependent Claim
26 words
A lintel structure as claimed in claim 1 wherein said elongated rigidifying one piece tubular beam means is a tubular beam of rectangular cross sectional configuration.
Claim 9
Dependent Claim
50 words
A lintel structure as claimed in claim 1 wherein said elongated rigidifying one piece tubular beam means is a tubular beam of rectangular cross sectional configuration with one of the smaller surfaces thereof in coextending parallel contiguous engagement with the planar surface of said elongated flat plate and affixed thereto.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |