Patent US3679723A successfully refreshed from Google Patents.
US3679723A
Expired / Lapsed
US
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Condensation products of aluminum hydroxide and an aluminum alcoholate
Assignee: Texaco Inc
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Filing: 1969-12-22
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Granted: 1972-07-25
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Expires: 1989-12-22
Abstract
Abstract The condensation products of aluminum hydroxide and an aluminum alcoholate are catalysts for the polymerization of cyclic alkylene oxides. These condensation products are useful alone or in combination with an organometallic compound as a catalyst for the high molecular weight polymerization of cyclic alkylene oxides. High molecular weight polymerized cyclic alkylene oxides are useful as thickeners, water friction reducers, adhesives, cosmetics, and elastomers.
Inventors
- 👤 Hideo Tomomatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:53
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2654
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
The reaction product as in claim 1 of a. aluminum hydroxide and b. an aluminum alkoxide.
Claim 2
Dependent Claim
53 words
The reaction product as in claim 2 wherein the aluminum alkoxide is a compound having the formula Al(OCnH2n 1)3 and n is one, two, three, or four, the mol ratio of aluminum hydroxide to aluminum alkoxide is about 1:2 and the reaction temperature is within the range from about 120* to 250* C.
Claim 3
Dependent Claim
14 words
The reaction product as in claim 3 wherein the aluminum alkoxide is aluminum isopropoxide.
Claim 4
Dependent Claim
14 words
The reaction product as in claim 3 wherein the aluminum alkoxide is aluminum sec-butoxide.
References Cited (Backward Citations)
US2801190A
Cited
US3054816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |