Patent US2855316A successfully refreshed from Google Patents.
US2855316A
Expired / Lapsed
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Boron nitride shapes and method of making
Assignee: Unifrax I LLC
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Filing: 1954-03-03
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Granted: 1958-10-07
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Expires: 1974-03-03
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:57
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A SHAPED ARTICLE OF MANUFACTURE CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF 5 TO 10% BY WEIGHT OF AN ALKALINE EARTH METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHATES, CARBONATES, SULFATES, OXIDES AND MIXTURES THEREOF, AND A BORON NITRIDE MATERIAL FORMED BY HEATING A MIX COMPRISING BORIC ACID AT A TEMPERATURE OF 800*C. TO 110*C. IN AN ATMOSPHERE OF AMMONIA, SAID ARTICLE HAVING AN APPARENT DENSITY OF ABOUT 2 G./CC. AND BEING RESISTANT TO ATTACK BY WATER.
Claim 2
Dependent Claim
78 words
A SHAPED ARTICLE OF MANUFACTURE CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF 5 TO 10% BY WEIGHT OF AN ALKALINE EARTH METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHATES, CARBONATES, SULFATES, OXIDES AND MIXTURES THEREOF, AND A BORON NITRIDE MATERIAL FORMED BY HEATING A MIX COMPRISING BORIC ACID AT A TEMPERATURE OF 800*C. TO 110*C. IN AN ATMOSPHERE OF AMMONIA, SAID ARTICLE HAVING AN APPARENT DENSITY OF ABOUT 2 G./CC. AND BEING RESISTANT TO ATTACK BY WATER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |