Patent US2598980A successfully refreshed from Google Patents.
US2598980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesia cement products and their manufacture
Assignee: F E SCHUNDLER AND Co Inc
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Filing: 1949-02-26
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Granted: 1952-06-03
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Expires: 1969-02-26
Abstract
No abstract record available.
Inventors
- 👤 Paul S Denning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:20
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
THE METHOD OF MAKING A MAGNESIA CEMENT PRODUCT COMPRISING MAGNESIUM OXIDE AND A MAGNESIUM SALT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM CHLORIDE AND MAGNESIUM SULPHATE AND CONTAINING NO FREE OR UNCOMBINED AMOUNTS OF SAID SALT, WHICH METHOD COMPRISES MAKING A SLURRY OF MAGNESIUM OXIDE AND A SOLUTION OF ONE OF SAID SALTS AND HAVING SUCH RATIO OF OXIDE TO SALT AS TO LEAVE NO FREE SALT IN THE PRODUCT AND CONTAINING SUBSTANTIALLY NO SOLID AGGREGATE, INCORPORATIONG THEREIN ABOUT 2% OR LESS OF A FOAM FORMING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDROLIZED PROTEIN AND NON-IONIC WETTING AGENTS, AGITATING THE SLURRY TO ENTRAIN AIR THEREIN TO PROVIDE A MOLDABLE CEMENT COMPRISING A VOLUMINOUS FOAM WHEREIN THE WALLS OF THE FOAM BUBBLES COMPRISE A UNIFORM FILM OF SAID CEMENT, SAID AIR BUBBLES ABSORBING SUBSTANTIALLY NO SALT SOLUTION THEREBY RENDERING ALL OF THE SAID SOLUTION AVAILABLE FOR REACTION WITH THE MAGNESIUM OXIDE, THE SAID SALT SOLUTION BEING OF GREATER CONCENTRATION THAN WOULD BE POSSIBLE IF THE CEMENT EMBODIED SOLID AGGREGATE EQUIVALENT IN VOLUME TO THAT OF THE AIR BUBBLES IN SAID CEMENT, AND THEN MOLDING THE CEMENT CONTAINING THE AIR BUBBLES.
Claim 2
Independent Claim
190 words
THE METHOD OF MAKING A MAGNESIA CEMENT PRODUCT COMPRISING MAGNESIUM OXIDE AND A MAGNESIUM SALT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM CHLORIDE AND MAGNESIUM SULPHATE AND CONTAINING NO FREE OR UNCOMBINED AMOUNTS OF SAID SALT, WHICH METHOD COMPRISES MAKING A SLURRY OF MAGNESIUM OXIDE AND A SOLUTION OF ONE OF SAID SALTS AND HAVING SUCH RATIO OF OXIDE TO SALT AS TO LEAVE NO FREE SALT IN THE PRODUCT AND CONTAINING SUBSTANTIALLY NO SOLID AGGREGATE, INCORPORATIONG THEREIN ABOUT 2% OR LESS OF A FOAM FORMING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDROLIZED PROTEIN AND NON-IONIC WETTING AGENTS, AGITATING THE SLURRY TO ENTRAIN AIR THEREIN TO PROVIDE A MOLDABLE CEMENT COMPRISING A VOLUMINOUS FOAM WHEREIN THE WALLS OF THE FOAM BUBBLES COMPRISE A UNIFORM FILM OF SAID CEMENT, SAID AIR BUBBLES ABSORBING SUBSTANTIALLY NO SALT SOLUTION THEREBY RENDERING ALL OF THE SAID SOLUTION AVAILABLE FOR REACTION WITH THE MAGNESIUM OXIDE, THE SAID SALT SOLUTION BEING OF GREATER CONCENTRATION THAN WOULD BE POSSIBLE IF THE CEMENT EMBODIED SOLID AGGREGATE EQUIVALENT IN VOLUME TO THAT OF THE AIR BUBBLES IN SAID CEMENT, AND THEN MOLDING THE CEMENT CONTAINING THE AIR BUBBLES.
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) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |