US2944291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for steam treating magnesium cement fibrous panels
Assignee: Tectum Corp
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Filing: 1957-10-28
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Granted: 1960-07-12
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Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 William L Prior
- 👤 Howard J Snelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:07
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF FORMING A LOW DENSITY POROUS PANEL COMPOSED OF FIBROUS MATERIAL AND A MAGNESIUM CEMENT BINDER COMPOSED OF WATER-BORNE MAGNESIUM OXIDE AND MAGNESIUM SALTS OF THE GROUP OF SULPHATE AND CHLORIDE, SAID BINDER BEING SETTABLE UPON HYDRATION BY AN EXOTHERMIC REACTION, WHICH METHOD CONSISTS ESSENTIALLY OF FORMING A POROUS LAYER OF FIBRES EACH OF WHICH IS THOROUGHLY COATED WITH SAID CEMENTITIOUS BINDER, COMPACTING THE POROUS LAYER SO FORMED BETWEEN COMPRESSING SURFACES AND, WHILE HOLDING THE LAYER BETWEEN SAID COMPRESSING SURFACES, SATURATING SAID POROUS LAYER WITH AN AQUEOUS FLUID AT A TEMPERATURE OF SUBSTANTIALLY 212% F. SO AS TO
Claim 2
Independent Claim
100 words
THE METHOD OF FORMING A LOW DENSITY POROUS PANEL COMPOSED OF FIBROUS MATERIAL AND A MAGNESIUM CEMENT BINDER COMPOSED OF WATER-BORNE MAGNESIUM OXIDE AND MAGNESIUM SALTS OF THE GROUP OF SULPHATE AND CHLORIDE, SAID BINDER BEING SETTABLE UPON HYDRATION BY AN EXOTHERMIC REACTION, WHICH METHOD CONSISTS ESSENTIALLY OF FORMING A POROUS LAYER OF FIBRES EACH OF WHICH IS THOROUGHLY COATED WITH SAID CEMENTITIOUS BINDER, COMPACTING THE POROUS LAYER SO FORMED BETWEEN COMPRESSING SURFACES AND, WHILE HOLDING THE LAYER BETWEEN SAID COMPRESSING SURFACES, SATURATING SAID POROUS LAYER WITH AN AQUEOUS FLUID AT A TEMPERATURE OF SUBSTANTIALLY 212% F. SO AS TO
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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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |