US3141857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foaming agent for making cellular concrete, and method of making same
Assignee: DR ING H NEGENDANK
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Filing: 1960-01-27
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Granted: 1964-07-21
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Expires: 1980-01-27
Abstract
No abstract record available.
Inventors
- 👤 Sommer Alois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:34
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; Y; Y10; Y10S; Y10S521/00; Y10S521/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A METHOD OF MAKING CELLULAR CONCRETE FOR CONSTRUCTION PURPOSES, COMPRISING THE STEPS OF FORMING A MIXTURE OF PORTLAND CEMENT, WATER IN THE AMOUNT OF ABOUT 25-50% BY WEIGHT OF THE CEMENT, AND A SMALL BUT EFFECTIVE AMOUNT NOT LESS THAN ABOUT 0.3% BY WEIGHT OF THE CEMENT OF A FOAMING AGENT CONTAINING ABOUT 20-25% BY WEIGHT OF THE FOAMING AGENT OF POWDERED POLYVINYL CHLORIDE, ABOUT 40-45% BY WEIGHT OF THE FOAMING AGENT OF A WATER-SOLUBLE ALKYLNAPHTHYLENE SULPHONATE IN WHICH THE ALKYL GROUPS CONTAIN 4-10 CARBON ATOMS, ABOUT 13-17% BY WEIGHT OF THE FOAMING AGENT OF A MEMBER OF THE CLASS CONSISTING OF LOWER ALKYL ESTERS OF POLYACRYLIC ACID IN AQUEOUS EMULSION AND WATER-SOLUBLE ALGINATES, BALANCE OF THE FOAMING AGENT ESSENTIALLY WATER, FORMING A FOAM BY VIOLENTLY AGITATING THE MIXTURE, AND ADDING TO THE FOAM FINELY DIVIDED MINERAL FILLER OF WHICH AT LEAST ABOUT 20% BY WEIGHT HAS A PARTICLE SIZE LESS THAN 0.2 MM. OF WHICH THE MAXIMUM PARTICLE SIZE IS NOT MORE THAN SUBSTANTIALLY 7 MM.
Claim 2
Independent Claim
167 words
A METHOD OF MAKING CELLULAR CONCRETE FOR CONSTRUCTION PURPOSES, COMPRISING THE STEPS OF FORMING A MIXTURE OF PORTLAND CEMENT, WATER IN THE AMOUNT OF ABOUT 25-50% BY WEIGHT OF THE CEMENT, AND A SMALL BUT EFFECTIVE AMOUNT NOT LESS THAN ABOUT 0.3% BY WEIGHT OF THE CEMENT OF A FOAMING AGENT CONTAINING ABOUT 20-25% BY WEIGHT OF THE FOAMING AGENT OF POWDERED POLYVINYL CHLORIDE, ABOUT 40-45% BY WEIGHT OF THE FOAMING AGENT OF A WATER-SOLUBLE ALKYLNAPHTHYLENE SULPHONATE IN WHICH THE ALKYL GROUPS CONTAIN 4-10 CARBON ATOMS, ABOUT 13-17% BY WEIGHT OF THE FOAMING AGENT OF A MEMBER OF THE CLASS CONSISTING OF LOWER ALKYL ESTERS OF POLYACRYLIC ACID IN AQUEOUS EMULSION AND WATER-SOLUBLE ALGINATES, BALANCE OF THE FOAMING AGENT ESSENTIALLY WATER, FORMING A FOAM BY VIOLENTLY AGITATING THE MIXTURE, AND ADDING TO THE FOAM FINELY DIVIDED MINERAL FILLER OF WHICH AT LEAST ABOUT 20% BY WEIGHT HAS A PARTICLE SIZE LESS THAN 0.2 MM. OF WHICH THE MAXIMUM PARTICLE SIZE IS NOT MORE THAN SUBSTANTIALLY 7 MM.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |