US2808314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making molded boron nitride bodies
Assignee: Unifrax I LLC
•
Filing: 1952-05-17
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Granted: 1957-10-01
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Expires: 1972-05-17
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C01; C01B; C01B21/00; C01B21/06; C01B21/064; C04B35/56; C04B35/565; C04B35/573; C01P; C01P2002/00; C01P2002/60; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF MAKING BORON NITRIDE BODIES WHICH COMPRISES HEATING A MIXTURE OF BORIC ACID AND TRICALEIUM PHOSPHATE IN AN ATMOSPHERE OF AMMONIA TO A TEMPERATURE OF 800*C. TO 1100*C. FOR SEVERAL HOURS TO NITRIDE THE BORIC ACID AND FORM BORON NITRIDE CONSISTING PREDOMINANTLY OF INDIVIDUAL CRYSTALS OF BORON NITRIDE IN THE ORDER OF .5 MICRON CRYSTAL SIZE, SEPARATING THE BORON NITRIDE FROM THE RESULTING PRODUCT, PLACING THE BORON NITRIDE IN A MOLD AND HOT PRESSING AT A TEMPERATURE OF 1500*C. TO 1900*C. AT A PRESSURE OF AT LEAST 400 POUNDS PER SQUARE INCH TO FORM A BORON NITRIDE BODY HAVING AN APPARENT DENSITY OF ABOUT 2.
Claim 2
Independent Claim
107 words
A METHOD OF MAKING BORON NITRIDE BODIES WHICH COMPRISES HEATING A MIXTURE OF BORIC ACID AND TRICALEIUM PHOSPHATE IN AN ATMOSPHERE OF AMMONIA TO A TEMPERATURE OF 800*C. TO 1100*C. FOR SEVERAL HOURS TO NITRIDE THE BORIC ACID AND FORM BORON NITRIDE CONSISTING PREDOMINANTLY OF INDIVIDUAL CRYSTALS OF BORON NITRIDE IN THE ORDER OF .5 MICRON CRYSTAL SIZE, SEPARATING THE BORON NITRIDE FROM THE RESULTING PRODUCT, PLACING THE BORON NITRIDE IN A MOLD AND HOT PRESSING AT A TEMPERATURE OF 1500*C. TO 1900*C. AT A PRESSURE OF AT LEAST 400 POUNDS PER SQUARE INCH TO FORM A BORON NITRIDE BODY HAVING AN APPARENT DENSITY OF ABOUT 2.
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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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |