US2837451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making alumina powder
Assignee: Mcintyre Res Foundation
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Filing: 1954-11-18
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Granted: 1958-06-03
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Expires: 1974-11-18
Abstract
No abstract record available.
Inventors
- 👤 John W G Hannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:32
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/007; A61K9/0073; A61K9/0075; C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/422; C01P; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/62; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD OF MANUFACTURING AN ALUMINUM OXIDE POWDER COMPRISING GRINDING PURE ALUMINUM PELLETS WHILE MAINTAINING SAID PELLETS FREE FROM CONTACT WITH SUBSTANCES OTHER THAN ALUMINUM, AND, DURING GRINDING, DRAWING THROUGH THE MILL AT A SUBSTANTIALLY CONSTANT UNIFORM RATE OF APPROXIMATELY 7 FEET PER MINUTE AIR CONTAINING A SUBSTANTIALLY CONSTANT MOISTURE CONTENT OF APPROXIMATELY 8 GRAINS OF MOISTURE PER CUBIC FOOT OF AIR TO DRAW OFF ALUMINUM OXIDE PARTICLES PRODUCED ON GRINDING, PASSING SAID CONSTANT MOISTURE CONTENT AIR CONTAINING PARTICLES DRAWN OFF FROM SAID MILL THROUHG A SETTLING CHAMBER TO SETTLE OUT LARGER PARTICLES DRAWN OFF AND SUBSEQUENTLY THROUGH A FILTERING MEDIUM TO FILTER OUT SMALLER PARTICLES AND COLLECTING SAID SMALLER PARTICLES.
Claim 2
Independent Claim
111 words
A METHOD OF MANUFACTURING AN ALUMINUM OXIDE POWDER COMPRISING GRINDING PURE ALUMINUM PELLETS WHILE MAINTAINING SAID PELLETS FREE FROM CONTACT WITH SUBSTANCES OTHER THAN ALUMINUM, AND, DURING GRINDING, DRAWING THROUGH THE MILL AT A SUBSTANTIALLY CONSTANT UNIFORM RATE OF APPROXIMATELY 7 FEET PER MINUTE AIR CONTAINING A SUBSTANTIALLY CONSTANT MOISTURE CONTENT OF APPROXIMATELY 8 GRAINS OF MOISTURE PER CUBIC FOOT OF AIR TO DRAW OFF ALUMINUM OXIDE PARTICLES PRODUCED ON GRINDING, PASSING SAID CONSTANT MOISTURE CONTENT AIR CONTAINING PARTICLES DRAWN OFF FROM SAID MILL THROUHG A SETTLING CHAMBER TO SETTLE OUT LARGER PARTICLES DRAWN OFF AND SUBSEQUENTLY THROUGH A FILTERING MEDIUM TO FILTER OUT SMALLER PARTICLES AND COLLECTING SAID SMALLER PARTICLES.
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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |