US3138472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making foamed magnesia cement
Assignee: Individual
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Filing: 1961-10-04
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Granted: 1964-06-23
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Expires: 1981-10-04
Abstract
No abstract record available.
Inventors
- 👤 Sommer Alois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:32
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/30; C04B2111/00; C04B2111/20; C04B2111/27; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A METHOD OF MAKING A FOAMED MAGNESIA CEMENT BY ADMIXTURE OF MAGNESIUM OXIDE AND A WATER-SOLUBLE SALT OF A BIVALENT METAL SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM SULPHATE AND CHLORIDE, FERROUS SULPHATE AND CHLORIDE, AND ZINC SULPHATE AND CHLORIDE, THE IMPROVEMENT COMPRISING THE STEPS OF MAKING AN AQUEOUS MIXTURE OF DISPERSED BITUMEN AND DISSOLVED FOAMING AGENT, AGITATING THE MIXTURE INTENSIVELY TO FORM A STABALE FOAM, AND ADDING MAGNESIUM OXIDE AND SAID WATER-SOLUBLE SALT TO THE FOAM WIHILE STIRRING.
Claim 2
Dependent Claim
80 words
IN A METHOD OF MAKING A FOAMED MAGNESIA CEMENT BY ADMIXTURE OF MAGNESIUM OXIDE AND A WATER-SOLUBLE SALT OF A BIVALENT METAL SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM SULPHATE AND CHLORIDE, FERROUS SULPHATE AND CHLORIDE, AND ZINC SULPHATE AND CHLORIDE, THE IMPROVEMENT COMPRISING THE STEPS OF MAKING AN AQUEOUS MIXTURE OF DISPERSED BITUMEN AND DISSOLVED FOAMING AGENT, AGITATING THE MIXTURE INTENSIVELY TO FORM A STABALE FOAM, AND ADDING MAGNESIUM OXIDE AND SAID WATER-SOLUBLE SALT TO THE FOAM WIHILE STIRRING.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |