US3240563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of refractory materials
Assignee: Union Carbide Corp
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Filing: 1963-08-21
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Granted: 1966-03-15
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Expires: 1983-08-21
Abstract
No abstract record available.
Inventors
- 👤 Robert A Mercuri
- 👤 Lawrence M Litz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:47
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/32; C04B33/326; C01; C01B; C01B21/00; C01B21/06; C01B21/064; C01B21/0648; C01B32/00; C01B32/90; C01B32/914; C01B32/991; C01B35/00; C01B35/02; C01B35/04; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B41/00; C04B41/009; C04B41/53; C04B41/80; C04B41/91
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PROCESS FOR REMOVING OXYGEN IMPURITIES FROM AN OXYGEN-CONTAIMINATED HOT PRESSED MATERIAL SELECTED FROM THE GROUP CONSISTING OF BORON NITRIDE, BORON CARBIDE AND TITANIUM BORIDES WHICH COMPRISES CONTACTING THE MATERIAL TO BE PURIFIED WITH A WATER VAPOR LADEN NON-REACTIVE GAS AT A TEMPERATURE BETWEEN ABOUT 120*C. AND 850*C. FOR A TIME SUFFICIENT TO PROVIDE THE DESIRED REMOVAL OF OXYGEN FROM SAID SELECTED MATERIAL.
References Cited (Backward Citations)
FR397463A
Cited
US2794708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |