US3112265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dispersions containing hydrous aluminum oxide
Assignee: Wyeth Holdings LLC
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Filing: 1960-09-21
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Granted: 1963-11-26
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Expires: 1980-09-21
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Yuille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:14
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/45; D06M2101/00; D06M2101/02; D06M2101/04; D06M2101/06; D06M2101/08; D06M2101/10; D06M2101/12; D06M2101/16; D06M2101/18; D06M2101/26; D06M2101/30; D06M2101/32; D06M2101/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING A STABLE THIXOTROPIC AQUEOUS DISPERSION, COMPRISING ADDING A WATER- SOLUBLE ALUMINUM SALT TO AN AQUEOUS SOLUTION OF ALKALI METAL BASES UNTIL A PH OF BETWEEN ABOUT 3 AND 5 IS OBTAINED, ADJUSTING THE PH OF THE DISPERSION TO BETWEEN ABOUT 6 AND 9 WITH AMMONIUM HYDROXIDE, DISPERSING THE PRECIPITATE BY MEANS OF A WATER-SOLUBLE PHOSPHATE DISPERSING AGENT, AND THEREAFTER MILLING THE DISPERSION WHEREBY A DISPERSION IS PROVIDED, THE MAJOR PORTION OF PARTICLES OF WHICH ARE 1.0 MICRON AND LESS IN DIAMETER.
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING A STABLE THIXOTROPIC AQUEOUS DISPERSION, COMPRISING ADDING A WATER- SOLUBLE ALUMINUM SALT TO AN AQUEOUS SOLUTION OF ALKALI METAL BASES UNTIL A PH OF BETWEEN ABOUT 3 AND 5 IS OBTAINED, ADJUSTING THE PH OF THE DISPERSION TO BETWEEN ABOUT 6 AND 9 WITH AMMONIUM HYDROXIDE, DISPERSING THE PRECIPITATE BY MEANS OF A WATER-SOLUBLE PHOSPHATE DISPERSING AGENT, AND THEREAFTER MILLING THE DISPERSION WHEREBY A DISPERSION IS PROVIDED, THE MAJOR PORTION OF PARTICLES OF WHICH ARE 1.0 MICRON AND LESS IN DIAMETER.
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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |