US4916012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement reinforcing fiber
Assignee: Mitsubishi Chemical Corp
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Filing: 1989-02-09
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Granted: 1990-04-10
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Expires: 2009-02-09
Abstract
Abstract A cement reinforcing fiber obtained by impregnating an organic or inorganic fiber with a thermosetting resin, then coating it with a rubber solution or rubber latex, and curing it.
Inventors
- 👤 Takeo Sawanobori
- 👤 Yuji Noguchi
- 👤 Hiromichi Sakai
- 👤 Kazuhiro Sone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:22
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/296; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
56 words
A cement reinforcing fiber prepared by a process comprising: impregnating a carbon fiber with from 50 to 200% by weight, relative to said fiber, of a thermosetting epoxy resin; coating the impregnated carbon fiber with from 10 to 200% by weight, relative to said fiber, of a styrene-butadiene rubber latex; and then curing said coated fiber.
Claim 2
Dependent Claim
56 words
A cement reinforcing fiber prepared by a process comprising: impregnating a carbon fiber with from 50 to 200% by weight, relative to said fiber, of a thermosetting epoxy resin; coating the impregnated carbon fiber with from 10 to 200% by weight, relative to said fiber, of a styrene-butadiene rubber latex; and then curing said coated fiber.
Claim 3
Dependent Claim
21 words
The cement reinforcing fiber of claim 1, wherein said styrene butadiene rubber latex contains a vulcanizing agent and a vulcanizing accelerator.
Claim 4
Dependent Claim
18 words
The cement reinforcing fiber of claim 1, wherein said styrene-butadiene rubber latex is a self-crosslinking modified rubber latex.
Claim 5
Dependent Claim
25 words
The cement reinforcing fiber of claim 1, wherein said fiber is coated with said styrene-butadiene rubber latex after the thermosetting epoxy resin has partially cured.
Claim 6
Dependent Claim
16 words
The cement reinforcing fiber of claim 1, wherein said rubber latex has a filler dispersed therein.
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) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |