Patent CH202038A successfully refreshed from Google Patents.
Patent US3850428A successfully refreshed from Google Patents.
Patent US3204276A successfully refreshed from Google Patents.
Patent US4126422A successfully refreshed from Google Patents.
US4126422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of densifying metal oxides
Assignee: Corning Glass Works
•
Filing: 1976-04-26
•
Granted: 1978-11-21
•
Expires: 1996-04-26
Abstract
Abstract A method for densifying a fumed metal oxide of Groups III and IV prepared by either a vapor phase oxidation or combustion process is disclosed wherein the metal oxide is mixed with a polar liquid in a high shear mixer, the metal oxide being present in an amount of about 35-50%, to convert it into a granulated material which, when dried, will substantially all pass through a 10 mesh screen. The granulated material may then be calcined preparatory to wet milling to prepare a casting slip, or it may be vitrified directly for molding or drawing in known manner.
Inventors
- 👤 Lewis H. Brandes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:15
CPC Classifications
C; C04; C04B; C04B33/00; C03; C03C; C03C1/00; C03C1/02; C03C1/026; C03C3/00; C03C3/04; C03C3/06; C04B35/00; C04B35/01; C04B35/14; C04B35/622; C04B35/626; C03C2201/00; C03C2201/02; C03C2203/00; C03C2203/20; C03C2203/40; Y; Y10; Y10S; Y10S65/00; Y10S65/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
A method for densifying a fumed metal oxide of Groups III and IV prepared by either a vapor phase oxidation or a combustion process which comprises: (a) mechanically mixing said fumed metal oxide with a polar liquid in a high shear mixer, said fumed metal oxide being present in an amount to yield a total solids content in the mixture of between about 35-50% with the said polar liquid being the remainder, and said mixing being carried out at a mixer speed and for a time sufficient to form a granulated material mixture, being insufficient to form a liquid suspension or gel; and then (b) drying said granulated material mixture to obtain dried material, said dried material substantially all passing through a 10 mesh screen.
Claim 2
Independent Claim
125 words
A method for densifying a fumed metal oxide of Groups III and IV prepared by either a vapor phase oxidation or a combustion process which comprises: (a) mechanically mixing said fumed metal oxide with a polar liquid in a high shear mixer, said fumed metal oxide being present in an amount to yield a total solids content in the mixture of between about 35-50% with the said polar liquid being the remainder, and said mixing being carried out at a mixer speed and for a time sufficient to form a granulated material mixture, being insufficient to form a liquid suspension or gel; and then (b) drying said granulated material mixture to obtain dried material, said dried material substantially all passing through a 10 mesh screen.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein the fumed metal oxide is silica.
Claim 4
Dependent Claim
11 words
A method according to claim 1 wherein the liquid is water.
Claim 5
Dependent Claim
19 words
A method according to claim 1 wherein the total solids content is in the range of 38% to 45%.
Claim 6
Dependent Claim
30 words
A method according to claim 1 wherein the granulated oxide is calcined at a temperature in the range of 1150°-1500° C. and then wet milled to form a casting slip.
Claim 7
Dependent Claim
16 words
A method according to claim 1 wherein said mixer speed is at least about 1800 rpm.
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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |