Patent US3039849A successfully refreshed from Google Patents.
US3039849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum oxide production
Assignee: EIDP Inc
•
Filing: 1957-06-05
•
Granted: 1962-06-19
•
Expires: 1977-06-05
Abstract
No abstract record available.
Inventors
- 👤 Oswin B Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:53
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/10; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/10; C01P2006/32; C01P2006/33; C01P2006/80; C01P2006/82; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR PREPARING MICROFIBROUS ALUMINA WHICH COMPRISES REACTING AT AN ELEVATED TEMPERATURE RANGING FROM ABOUT 100*C. TO THE BOILING POINT OF MERCURY WITHIN A REACTION ZONE A WATER-CONTAINING OXIDIZING GAS WITH A FLOWING STREAM OF A CONSTANT DILUTE LIQUID ALUMINUM AMALGAM THE ALUMINUM CONCENTRATION OF WHICH RANGES FROM.003% AND NOT TO EXCEED 0.2% BY WEIGHT, DURING SAID REACTION MAINTAINING A LAYER OF A COHERENT, FIBROUS ALUMINA INTERMEDIATE MASS INTERPOSED BETWEEN SAID OXIDIZING GAS AND ON OR IN DIRECT CONTACT WITH SAID AMALGAM STREAM UNTIL SAID MASS IS MADE UP OF PARALLEL FIBRILS GROWING VERTICALLY FROM THE SUPPORTING STREAM SURFACE, AND REMOVING THE ALUMINA A PRODUCT FROM SAID ZONE.
Claim 2
Dependent Claim
109 words
A PROCESS FOR PREPARING MICROFIBROUS ALUMINA WHICH COMPRISES REACTING AT AN ELEVATED TEMPERATURE RANGING FROM ABOUT 100*C. TO THE BOILING POINT OF MERCURY WITHIN A REACTION ZONE A WATER-CONTAINING OXIDIZING GAS WITH A FLOWING STREAM OF A CONSTANT DILUTE LIQUID ALUMINUM AMALGAM THE ALUMINUM CONCENTRATION OF WHICH RANGES FROM.003% AND NOT TO EXCEED 0.2% BY WEIGHT, DURING SAID REACTION MAINTAINING A LAYER OF A COHERENT, FIBROUS ALUMINA INTERMEDIATE MASS INTERPOSED BETWEEN SAID OXIDIZING GAS AND ON OR IN DIRECT CONTACT WITH SAID AMALGAM STREAM UNTIL SAID MASS IS MADE UP OF PARALLEL FIBRILS GROWING VERTICALLY FROM THE SUPPORTING STREAM SURFACE, AND REMOVING THE ALUMINA A PRODUCT FROM SAID ZONE.
References Cited (Backward Citations)
US2067015A
Cited
US2371880A
Cited
US2274634A
Cited
US2643935A
Cited
US2787522A
Cited
US2779066A
Cited
US2742115A
Cited
US2699415A
Cited
US2746842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |