Patent US3926650A successfully refreshed from Google Patents.
US3926650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foaming agent for plaster and cement compositions
Assignee: Hoechst AG
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Filing: 1974-02-26
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Granted: 1975-12-16
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Expires: 1994-02-26
Abstract
Abstract This invention relates to a foamable composition comprising water, calcined gypsum or hydraulic cement and, as a foaming agent, the sodium salt of an Alpha -olefin sulfonate of an olefin having 14 to 20 carbon atoms in the molecule, or the sodium salt of the sulfuric acid ester of an alkyl polyglycol ether, which ether is prepared by hydroxyethylation of one mole of a fatty alcohol having a carbon chain of 10 to 14 carbon atoms with, on the average, 3 moles of ethylene oxide, or a mixture of both of the said sodium salts.
Inventors
- 👤 Jost Lange
- 👤 Gerhart Schneider
- 👤 Albert Zeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:14
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16; C04B28/00; C04B28/02; C04B28/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A FOAMABLE COMPOSITION COMPRISING WATER, CALCINED GYPSUM OR HYDRAULIC CEMENT AND, AS A FOAMING AGENT, ABOUT 0.01 TO 5 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF CALCINED GYPSUM OR HYDRAULIC CEMENT, OF THE SODIUM SALT OF AN A-OLEFIN SULFONATE OF AN OLEFIN HAVING 14 TO 20 CARBON ATOMS IN THE MOLECULE.
Claim 2
Dependent Claim
53 words
A FOAMABLE COMPOSITION COMPRISING WATER, CALCINED GYPSUM OR HYDRAULIC CEMENT AND, AS A FOAMING AGENT, ABOUT 0.01 TO 5 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF CALCINED GYPSUM OR HYDRAULIC CEMENT, OF THE SODIUM SALT OF AN A-OLEFIN SULFONATE OF AN OLEFIN HAVING 14 TO 20 CARBON ATOMS IN THE MOLECULE.
Claim 3
Dependent Claim
121 words
A foamable composition comprising water, calcined gypsum and hydraulic cement and, as a foaming agent, an Alpha -olefin sulfonate of an olefin having 14 to 20 carbon atoms in the molecule blended with up to 2 parts by weight per part by weight of said Alpha -olefin sulfonate, of the sodium salt of the sulfuric acid ester of an alkyl polyglycol ether, which is prepared by hydroxyethylation of one mole of a fatty alcohol having a carbon chain of 10 to 14 carbon atoms with, on the average, 3 moles of ethylene oxide, said blended foaming agent being present in a quantity of about 0.01 to 5 parts by weight per 100 parts by weight of calcined gypsum or hydraulic cement.
Claim 4
Dependent Claim
121 words
A foamable composition comprising water, calcined gypsum and hydraulic cement and, as a foaming agent, an Alpha -olefin sulfonate of an olefin having 14 to 20 carbon atoms in the molecule blended with up to 2 parts by weight per part by weight of said Alpha -olefin sulfonate, of the sodium salt of the sulfuric acid ester of an alkyl polyglycol ether, which is prepared by hydroxyethylation of one mole of a fatty alcohol having a carbon chain of 10 to 14 carbon atoms with, on the average, 3 moles of ethylene oxide, said blended foaming agent being present in a quantity of about 0.01 to 5 parts by weight per 100 parts by weight of calcined gypsum or hydraulic cement.
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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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |