US4048278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing dimensionally-stable shaped articles
Assignee: Intalite International NV
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Filing: 1976-04-19
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Granted: 1977-09-13
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Expires: 1996-04-19
Abstract
Abstract A method for making a dimensionally-stable shaped article (comprising at least one one layer of asbestos paper treated with a mineral acid selected from sulfuric acid, hydrochloric acid and phosphoric acid), including placing the treated asbestos paper sheet on a mould in a substantially pressureless manner and then allowing it to dry at normal room temperature.
Inventors
- 👤 George D. Mosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:41
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5076; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A method for the manufacture of a dimensionally-stable shaped article for use as a ceiling coffer, comprising the steps of soaking asbestos paper sheets in a bath containing a mineral acid selected from the group consisting of sulfuric acid, hydrochloric acid and phosphoric acid, applying in a substantially pressureless manner at least one sheet of the soaked asbestos paper sheet as a layer to a mold and drying at normal room temperature, whereby to form a shrink-proof article without application of heat.
Claim 2
Independent Claim
82 words
A method for the manufacture of a dimensionally-stable shaped article for use as a ceiling coffer, comprising the steps of soaking asbestos paper sheets in a bath containing a mineral acid selected from the group consisting of sulfuric acid, hydrochloric acid and phosphoric acid, applying in a substantially pressureless manner at least one sheet of the soaked asbestos paper sheet as a layer to a mold and drying at normal room temperature, whereby to form a shrink-proof article without application of heat.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein the bath comprises phosphoric acid in a concentration of 10 to 100% by weight.
Claim 4
Dependent Claim
25 words
A method according to claim 2 wherein the bath comprises 60% by weight of 85% technical grade phosphoric acid and 40% by weight of water.
Claim 5
Dependent Claim
18 words
A method according to claim 3 wherein the asbestos sheet is of a thickness of about 1/8 inches.
Claim 6
Dependent Claim
63 words
A method according to claim 1, including the additional step of applying a cement composition to the shaped article, said cement composition comprising 16.0% by weight cement mortar modifier, 0.25% by weight of non-ionic surfactant, 3.5% by weight of pigment, 56.5% by weight of silica, 18.5% by weight white Portland cement, 5.25% by weight of water and a minor amount of an aggregate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |