Patent US4700518A successfully refreshed from Google Patents.
US4700518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete panel having tile driven
Assignee: Kajima Corp
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Filing: 1985-09-19
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Granted: 1987-10-20
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Expires: 2005-09-19
Abstract
Abstract This invention is characterized by a concrete panel having tiles driven on the surface and carbon fibers mixed in the base material concrete and further including reinforcing iron materials being electrically isolated by a layer of material from the carbon fibers imbedded in the body of concrete. Said layer of material preventing corrosion of the iron materials.
Inventors
- 👤 Shigeyuki Akihama
- 👤 Makoto Saito
- 👤 Akio Kawamoto
- 👤 Tadashi Banno
- 👤 Yoshihiko Umeki
- 👤 Takumi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:24
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
In a building panel comprising a body of concrete and pre-attached tiles providing a finished surface on said concrete, the improvement comprising: said body of concrete including reinforcing carbon fibers therein and reinforcing iron materials embedded therein, said carbon fibers having extremely low drying shrinkage ratio and high dimensional stability effectively preventing cracking and exfoliation of said tiles, and said reinforcing iron materials being electrically isolated from the said carbon fibers and protected from the corrosion promoting electroconductive action thereof by a layer of material on said iron materials having a thickness providing an electrical resistance above 100 ohms.
Claim 2
Dependent Claim
99 words
In a building panel comprising a body of concrete and pre-attached tiles providing a finished surface on said concrete, the improvement comprising: said body of concrete including reinforcing carbon fibers therein and reinforcing iron materials embedded therein, said carbon fibers having extremely low drying shrinkage ratio and high dimensional stability effectively preventing cracking and exfoliation of said tiles, and said reinforcing iron materials being electrically isolated from the said carbon fibers and protected from the corrosion promoting electroconductive action thereof by a layer of material on said iron materials having a thickness providing an electrical resistance above 100 ohms.
Claim 3
Dependent Claim
17 words
A building panel as defined in claim 1, wherein said layer of material is an epoxy resin.
Claim 4
Dependent Claim
20 words
A building panel as defined in claim 1, wherein said layer of material has an electrical resistance above 500 ohms.
Claim 5
Dependent Claim
28 words
A building panel as defined in claim 1, wherein said layer of material is an epoxy resin and said layer has a thickness of at least 100 μm.
Claim 6
Dependent Claim
17 words
A building panel as defined in claim 1, wherein said carbon fibers are high elasticity carbon fibers.
Claim 7
Dependent Claim
17 words
A building panel as defined in claim 1, wherein said carbon fibers are low elasticity carbon fibers.
Claim 8
Dependent Claim
28 words
A building panel as defined in claim 1, wherein the said body of concrete has a relatively low ratio of drying shrinkage less than approximately 15×10 -4 .
Claim 9
Dependent Claim
38 words
A building panel as defined in claim 1, wherein the said body of concrete also contains a filling of a light aggregate material in an amount to lower the specific gravity of the concrete body to around 1.0.
Claim 10
Dependent Claim
52 words
A building panel as defined in claim 1, wherein the said tiles are attached to a front face of said body of concrete and said reinforcing iron materials include an anchor bolt embedded in said body of concrete and having a portion protruding from the back face of said body of concrete.
Claim 11
Independent Claim
69 words
The method of fabricating a tile faced body of concrete having carbon fibers and reinforcing iron materials both embedded in said body of concrete and tiles press bonded to a face thereof, which method includes the step of applying a layer of material on said iron materials having a thickness providing an electrical resistance above 100 ohms to electrically isolate said iron materials from the said embedded carbon fibers.
Claim 12
Independent Claim
69 words
The method of fabricating a tile faced body of concrete having carbon fibers and reinforcing iron materials both embedded in said body of concrete and tiles press bonded to a face thereof, which method includes the step of applying a layer of material on said iron materials having a thickness providing an electrical resistance above 100 ohms to electrically isolate said iron materials from the said embedded carbon fibers.
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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) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |