US4010581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cored slab building construction
Assignee: Individual
•
Filing: 1975-07-17
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Granted: 1977-03-08
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Expires: 1995-07-17
Abstract
Abstract A building construction of precast concrete slabs having cored channels running therethrough. The slabs are arranged to define upstanding walls and horizontal floor-ceiling members. Openings concealed by the junctures between slabs, provide communication between channels of adjacent slabs. Further openings, displaced from the junctures, provide for access to the communicating channels for installation or service of utilities in those channels, after the building is erected.
Inventors
- 👤 Raymond C. Keturi
- 👤 Wayne R. Sandstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:06
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/44; E04C2/52; E04C2/521; E04B; E04B1/00; E04B1/02; E04B1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
189 words
In a building construction employing precast concrete slabs having generally parallel core channels extending therethrough from one edge to an opposed edge between opposed faces thereof, the improvement comprising: a first of said slabs arranged to define an upstanding wall with its core channels extending vertically; a second of said slabs arranged generally horizontally with its core channels extending perpendicular to said first slab and with said second slab extending across the upper edge of said first slab; said second slab having at least one opening through its face adjacent said edge of said first slab, said opening being between the faces of said first slab and communicating with one of the core channels of said second slab; plug means closing those ends of all the core channels of said second slab adjacent said first slab; and a solid precast beam member extending along said edge of said first slab and being of a width to cover only a portion of the ends of the core channels of said first slab and thereby define a channel extending along said edge and open at one side of said first slab.
Claim 2
Dependent Claim
189 words
In a building construction employing precast concrete slabs having generally parallel core channels extending therethrough from one edge to an opposed edge between opposed faces thereof, the improvement comprising: a first of said slabs arranged to define an upstanding wall with its core channels extending vertically; a second of said slabs arranged generally horizontally with its core channels extending perpendicular to said first slab and with said second slab extending across the upper edge of said first slab; said second slab having at least one opening through its face adjacent said edge of said first slab, said opening being between the faces of said first slab and communicating with one of the core channels of said second slab; plug means closing those ends of all the core channels of said second slab adjacent said first slab; and a solid precast beam member extending along said edge of said first slab and being of a width to cover only a portion of the ends of the core channels of said first slab and thereby define a channel extending along said edge and open at one side of said first slab.
Claim 3
Dependent Claim
109 words
In a building construction employing precast concrete slabs having generally parallel core channels extending therethrough from one edge to an opposed edge between opposed faces thereof, the improvement comprising: one of said slabs being arranged generally horizontally with one edge portion thereof resting on a supporting structure including an elongated beam member with its core channels extending perpendicular to said beam member, said supporting structure and beam member defining an open channel extending along and facing said one edge portion of said slab, and at least one opening in a face of said slab providing communication between said open channel and one of the core channels of said slab.
Claim 4
Dependent Claim
109 words
In a building construction employing precast concrete slabs having generally parallel core channels extending therethrough from one edge to an opposed edge between opposed faces thereof, the improvement comprising: one of said slabs being arranged generally horizontally with one edge portion thereof resting on a supporting structure including an elongated beam member with its core channels extending perpendicular to said beam member, said supporting structure and beam member defining an open channel extending along and facing said one edge portion of said slab, and at least one opening in a face of said slab providing communication between said open channel and one of the core channels of said slab.
References Cited (Backward Citations)
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Cited
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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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |