US2947056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered alumina articles and a process for the production thereof
Assignee: Kabel Es Muanyaggyar
•
Filing: 1957-10-08
•
Granted: 1960-08-02
•
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 20:54
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.
References Cited (Backward Citations)
US2108513A
Cited
US1107012A
Cited
US2030200A
Cited
US2270607A
Cited
US2388080A
Cited
US2314758A
Cited
US2457515A
Cited
US2531397A
Cited
US2698990A
Cited
US2618567A
Cited
US2810182A
Cited
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 |