US4132555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building board
Assignee: Cape Building Products Ltd
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Filing: 1976-11-04
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Granted: 1979-01-02
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Expires: 1996-11-04
Abstract
Abstract A composition suitable for the manufacture of shaped articles comprising (i) a water-settable inorganic binder which is one or more of a calcium silicate binder, Portland cement, aluminous cement, and blast furnace slag cement, and (ii) fibrous reinforcing material, wherein the fibrous reinforcing material is free from asbestoc fibres and includes organic fibres which do not melt below 140° C.
Inventors
- 👤 Victor E. Barrable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:52
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/18; C04B28/186; C04B28/188; C04B2111/00; C04B2111/10; C04B2111/12; C04B2111/20; C04B2111/28; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
62 words
An asbestos-free building board or like product which can be used to provide a fire-resisting structure, made from a composition which comprises water-settable binder, reinforcing fibers including organic fibers and exclusive of asbestos fibers, and vermiculite in amount sufficient to confer fire-resistant properties to the product, said vermiculite being present in amount of about 12% to 50% by weight of the product.
Claim 2
Dependent Claim
62 words
An asbestos-free building board or like product which can be used to provide a fire-resisting structure, made from a composition which comprises water-settable binder, reinforcing fibers including organic fibers and exclusive of asbestos fibers, and vermiculite in amount sufficient to confer fire-resistant properties to the product, said vermiculite being present in amount of about 12% to 50% by weight of the product.
Claim 3
Dependent Claim
22 words
A building product as defined in claim 1 wherein said vermiculite is present in amount of 12% by weight of the product.
Claim 4
Dependent Claim
22 words
A building product as defined in claim 1 wherein said vermiculite is present in amount of 13% by weight of the product.
Claim 5
Dependent Claim
22 words
A building product as defined in claim 1 wherein said vermiculite is present in amount of 50% by weight of the product.
Claim 6
Dependent Claim
15 words
A building product as defined in claim 1 wherein said binder is calcium silicate hydrate.
Claim 7
Dependent Claim
15 words
A building product as defined in claim 5 wherein said organic fibers are cellulosic fibers.
Claim 8
Dependent Claim
15 words
A building product as defined in claim 4 wherein said organic fibers are cellulosic fibers.
Claim 9
Dependent Claim
23 words
A bulding product as defined in claim 1 wherein said binder is calcium silicate hydrate having the crystal structure of tobermorite or xonotlite.
Claim 10
Dependent Claim
77 words
An asbestos-free building board or like product which can be used to provide a fire-resisting structure, made from a composition which comprises a water-settable binder, reinforcing fibers including at least 5% by weight thereof as organic fibers and exclusive of asbestos fibers, and vermiculite, said binder being present in an amount of 80-89% by weight of binder plus reinforcing fiber, and said vermiculite being present in amount of about 12% to 50% by weight of the product.
Claim 11
Dependent Claim
77 words
An asbestos-free building board or like product which can be used to provide a fire-resisting structure, made from a composition which comprises a water-settable binder, reinforcing fibers including at least 5% by weight thereof as organic fibers and exclusive of asbestos fibers, and vermiculite, said binder being present in an amount of 80-89% by weight of binder plus reinforcing fiber, and said vermiculite being present in amount of about 12% to 50% by weight of the product.
Claim 12
Dependent Claim
15 words
A building product as defined in claim 9 wherein said binder is calcium silicate hydrate.
Claim 13
Dependent Claim
15 words
A building product as defined in claim 10 wherein said organic fibers are cellulosic fibers.
Claim 14
Independent Claim
104 words
The method of making an asbestos-free building board which can be used to provide fire-resisting structures, which comprises the steps of: (a) forming an aqueous slurry comprising a water-settable binder, reinforcing fibers including at least 5% by weight cellulosic fibers and exclusive of asbestos fibers, vermiculite and water, said binder being present in an amount of 50-99%, by weight, based on the total of binder and reinforcing fiber, and said vermiculite being present in amount of about 12% to 50% by weight of total solids; (b) dewatering said slurry to form a sheet; and then (c) curing said sheet to form the building board.
Claim 15
Independent Claim
104 words
The method of making an asbestos-free building board which can be used to provide fire-resisting structures, which comprises the steps of: (a) forming an aqueous slurry comprising a water-settable binder, reinforcing fibers including at least 5% by weight cellulosic fibers and exclusive of asbestos fibers, vermiculite and water, said binder being present in an amount of 50-99%, by weight, based on the total of binder and reinforcing fiber, and said vermiculite being present in amount of about 12% to 50% by weight of total solids; (b) dewatering said slurry to form a sheet; and then (c) curing said sheet to form the building board.
Claim 16
Dependent Claim
23 words
The method according to claim 12 wherein said binder is present in amount of 80-89% by weight based on binder and reinforcing fiber.
Claim 17
Dependent Claim
50 words
The method according to claim 13 wherein step (a) comprises first forming the slurry with a water:solids ratio of 5:1 to 10:1 and then diluting the slurry to a water:solids ratio of about 25:1, and wherein step (b) is performed on a Magnani machine, a Hatschek machine or a press.
Claim 18
Dependent Claim
50 words
The method according to claim 12 wherein step (a) comprises first forming the slurry with a water:solids ratio of 5:1 to 10:1 and then diluting the slurry to a water:solids ratio of about 25:1, and wherein step (b) is performed on a Magnani machine, a Hatschek machine or a press.
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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) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |