US5017524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic cutting tool
Assignee: Iscar Ltd
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Filing: 1990-04-11
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Granted: 1991-05-21
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Expires: 2010-04-11
Abstract
Abstract A composition for a ceramic cutting tool which enjoys long tool life at high speed machining of ferrous alloys. The composition consists essentially of 60-80% alpha aluminum oxide (Al 2 O 3 ) having a hexagonal crystal structure and the remainder of titanium carbonitride (TiCN). The titanium carbonitride has a mixture of 30-70% titanium carbide and the remainder titanium nitride. The mixture is compacted and hot pressed, sintered or pressure sintered to form the tool.
Inventors
- 👤 David Moskowitz
- 👤 Reuven Porat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
53 words
A composition for a ceramic cutting tool consisting essentially of 60-80% by weight of alpha aluminum oxide, (Al 2 O 3 ) having a hexagonal crystal structure and 20-40% by weight w/w% titanium carbonitride (TiCN) wherein said titanium carbonitride consists essentially of 30-70 mol % titanium carbide and 30-70 mol % titanium nitride.
Claim 2
Dependent Claim
53 words
A composition for a ceramic cutting tool consisting essentially of 60-80% by weight of alpha aluminum oxide, (Al 2 O 3 ) having a hexagonal crystal structure and 20-40% by weight w/w% titanium carbonitride (TiCN) wherein said titanium carbonitride consists essentially of 30-70 mol % titanium carbide and 30-70 mol % titanium nitride.
Claim 3
Dependent Claim
25 words
The invention as defined in claim 1 wherein said titanium carbonitride consists essentially of 30-50 mol % titanium carbide and 50-70 mol % titanium nitride.
Claim 4
Dependent Claim
23 words
The invention as defined in claim 1 wherein said composition consists essentially of 70% aluminum oxide and 30% titanium carbonitride (TiCN) by weight.
Claim 5
Dependent Claim
73 words
A ceramic cutting tool having a composition which consists essentially of 60-80% by weight of alpha aluminum oxide (Al 2 O 3 ) and 20 to 40% by weight w/w % titanium carbonitride (TiCN) wherein said titanium carbonitride consists essentially of 30-70 mol % titanium carbide and 30-70 mol % titanium nitride, said tool being formed by compacting a mixture of said composition and then hot-pressing, sintering, or pressure sintering said compacted mixture.
Claim 6
Dependent Claim
73 words
A ceramic cutting tool having a composition which consists essentially of 60-80% by weight of alpha aluminum oxide (Al 2 O 3 ) and 20 to 40% by weight w/w % titanium carbonitride (TiCN) wherein said titanium carbonitride consists essentially of 30-70 mol % titanium carbide and 30-70 mol % titanium nitride, said tool being formed by compacting a mixture of said composition and then hot-pressing, sintering, or pressure sintering said compacted mixture.
References Cited (Backward Citations)
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US4320203A
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US4366254A
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US4526875A
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US4543343A
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US4746563A
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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) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |