Patent US2947056A successfully refreshed from Google Patents.
US2947056A
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Sintered alumina articles and a process for the production thereof
Assignee: Kabel Es Muanyaggyar
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Filing: 1957-10-08
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Granted: 1960-08-02
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Expires: 1977-10-08
Abstract
No abstract record available.
Inventors
- 👤 Csordas Istvan
- 👤 Lanyi Bela
- 👤 Veress Zoltan
- 👤 Vissy Laszlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:49
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/025; Y; Y10; Y10S; Y10S264/00; Y10S264/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR THE MANUFACTURE OF SINTERED ALUMINA BODY ADAPTED TO BE USED FOR CUTTING AND DRAWING TOOLS, COMPRISING MOLDING X-ALUMINA POWDER, HAVING AT LEAST 99.99% AL2O3 CONTENT, THE X-ALUMINA PARTICLES BEING LESS THAN 3 MICRONS IN DIAMETER AND AT LEAST 90% OF SAME BEING LESS THAN 1 MICRON, INTO A SHAPED BODY, THAN SINTERING AT A TEMPERATURE BETWEEN 1450* AND 1500*C., AND KEEPING SAID BODY AT THE MAXIMUM SINTERING TEMPERATURE FOR SUCH A SHORT TIME THAT AT LEAST 90% OF THE GRAIN SIZE OF THE SINTERED BODY SHOULD NOT EXCEED 10 MICRONS.
Claim 2
Dependent Claim
93 words
A PROCESS FOR THE MANUFACTURE OF SINTERED ALUMINA BODY ADAPTED TO BE USED FOR CUTTING AND DRAWING TOOLS, COMPRISING MOLDING X-ALUMINA POWDER, HAVING AT LEAST 99.99% AL2O3 CONTENT, THE X-ALUMINA PARTICLES BEING LESS THAN 3 MICRONS IN DIAMETER AND AT LEAST 90% OF SAME BEING LESS THAN 1 MICRON, INTO A SHAPED BODY, THAN SINTERING AT A TEMPERATURE BETWEEN 1450* AND 1500*C., AND KEEPING SAID BODY AT THE MAXIMUM SINTERING TEMPERATURE FOR SUCH A SHORT TIME THAT AT LEAST 90% OF THE GRAIN SIZE OF THE SINTERED BODY SHOULD NOT EXCEED 10 MICRONS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |