Patent US4663554A successfully refreshed from Google Patents.
US4199366A
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US
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Fiber-reinforced cement-like material
Assignee: Inventa AG fuer Forschung und Patentverwertung
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Filing: 1978-11-20
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Granted: 1980-04-22
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Expires: 1998-11-20
Abstract
Abstract The present invention provides for a novel fiber-reinforced cement-like material which is characterized by having short polyvinyl alcohol fibers in an amount of at least 2 volume % based on the total volume of said material. These fibers have an elongation at break of between about 4 and 8% and a modulus of more than 130 g/dtex. A process for the preparation of said material is also disclosed.
Inventors
- 👤 Peter Schaefer
- 👤 Marcel Capaul
- 👤 Wolfgang Griehl
- 👤 Peter Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:25
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B16/00; C04B16/04; C04B16/06; C04B16/0616; C04B16/0641; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
44 words
A fiber-reinforced cement-like material comprising at least 2 volume % of fibers of polyvinyl alchol having an elongation at break of between about 4 and 8%, a modulus of more than 130 g/dtex, and a length of between about 3 mm and 12 mm.
Claim 2
Dependent Claim
44 words
A fiber-reinforced cement-like material comprising at least 2 volume % of fibers of polyvinyl alchol having an elongation at break of between about 4 and 8%, a modulus of more than 130 g/dtex, and a length of between about 3 mm and 12 mm.
Claim 3
Dependent Claim
18 words
The material of claim 1 wherein said fibers have a denier of between about 1 and 5 dtex.
Claim 4
Dependent Claim
23 words
The material of claim 1 wherein said fibers are present in said material in amount of between about 2 and 20 volume %.
Claim 5
Dependent Claim
32 words
The material of claim 1 further comprising at least one cement-like material selected from the group consisting of Portland cement, alumina cement, iron Portland cement, trass cement, blast furnace cement, and gypsum.
Claim 6
Dependent Claim
19 words
The material of claim 1 wherein said fibers contain at least one number selected from brighteners and adhesive agents.
Claim 7
Dependent Claim
25 words
The material of claim 1 further comprising at least one member selected from the group consisting of asbestos, glass, synthetic fibers, natural fibers, and adjuvants.
Claim 8
Dependent Claim
17 words
The material of claim 6 wherein said adjuvants are selected from cellulose waste, wood chips, and fibrids.
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) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |