Patent US4631133A successfully refreshed from Google Patents.
US2939799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium oxychloride cements
Assignee: FMC Corp
•
Filing: 1957-04-02
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Granted: 1960-06-07
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Expires: 1977-04-02
Abstract
No abstract record available.
Inventors
- 👤 Harry E Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:28
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/30; C04B28/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A COMPOSITION SUITABLE FOR MIXING WITH MAGNESIUM CHLORIDE AND WATER TO FORM MAGNESIUM OXYCHLORIDE CEMENT PLASTER HAVING A MAGNESIUM CHLORIDE TO MAGNESIUM OXIDE RATIO OF AT LEAST 0.372, SAID COMPOSITION CONSISTING ESSENTIALLY OF MAGNESIUM OXIDE, INERT FILLERS, AND FROM 0.01% TO 1.5% BY WEIGHT OF A HYDROPHILIE COLLOID SELECTED FROM THE GROUP CONSISTING OF WATERSOLUBLE CARBOXYMETHYLCELLULOSE, ALKALI METAL SALTS THEREOF, AND METHYL VINYL ETHER-AMMONIUM MALEAMATE COPOLYMER.
Claim 2
Dependent Claim
66 words
A COMPOSITION SUITABLE FOR MIXING WITH MAGNESIUM CHLORIDE AND WATER TO FORM MAGNESIUM OXYCHLORIDE CEMENT PLASTER HAVING A MAGNESIUM CHLORIDE TO MAGNESIUM OXIDE RATIO OF AT LEAST 0.372, SAID COMPOSITION CONSISTING ESSENTIALLY OF MAGNESIUM OXIDE, INERT FILLERS, AND FROM 0.01% TO 1.5% BY WEIGHT OF A HYDROPHILIE COLLOID SELECTED FROM THE GROUP CONSISTING OF WATERSOLUBLE CARBOXYMETHYLCELLULOSE, ALKALI METAL SALTS THEREOF, AND METHYL VINYL ETHER-AMMONIUM MALEAMATE COPOLYMER.
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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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |