Patent US4410446A successfully refreshed from Google Patents.
US4410446A
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Zinc oxide dispersions by decomposition of zinc acetate
Assignee: Baker Hughes Holdings LLC
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Filing: 1979-06-07
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Granted: 1983-10-18
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Expires: 1999-06-07
Abstract
Abstract This invention relates to stable, fluid zinc-containing dispersions and the preparations thereof by the high temperature decomposition of zinc acetate to ZnO in a dispersant-containing fluid, said dispersant being stable at the temperature of decomposition.
Inventors
- 👤 William J. Cheng
- 👤 David B. Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0047; C; C01; C01G; C01G9/00; C01G9/02; C09; C09D; C09D17/00; C09D17/004; C09D17/007
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A process of preparing a stable, fluid zinc-containing dispersion which comprises decomposing zinc acetate to ZnO at a temperature above about 270° C. in a dispersant-containing fluid, said fluid being a non-volatile process fluid capable of being heated to the decomposition temperature of zinc acetate, said dispersant being relatively stable under the high temperature conditions of this process and being capable of retaining the zinc compound formed by decomposition in stable suspension and being selected from the group consisting of saturated and unsaturated fatty acids, naphthenic acids and alkali and alkaline earth metal salts thereof, oxyalkylated fatty amines, alkylphenols, sulfurized alkylphenols and oxyalkylated alkylphenols.
Claim 2
Dependent Claim
104 words
A process of preparing a stable, fluid zinc-containing dispersion which comprises decomposing zinc acetate to ZnO at a temperature above about 270° C. in a dispersant-containing fluid, said fluid being a non-volatile process fluid capable of being heated to the decomposition temperature of zinc acetate, said dispersant being relatively stable under the high temperature conditions of this process and being capable of retaining the zinc compound formed by decomposition in stable suspension and being selected from the group consisting of saturated and unsaturated fatty acids, naphthenic acids and alkali and alkaline earth metal salts thereof, oxyalkylated fatty amines, alkylphenols, sulfurized alkylphenols and oxyalkylated alkylphenols.
Claim 3
Dependent Claim
22 words
The process of claim 1 where the dispersant is a saturated or unsaturated acid or alkali or alkaline earth metal salt thereof.
Claim 4
Dependent Claim
16 words
The process of claim 2 where the salt is an alkali or alkaline earth metal naphthenate.
Claim 5
Dependent Claim
11 words
The process of claim 3 where the salt is magnesium naphthenate.
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) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |