US2887393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory bodies containing boron nitride
Assignee: Unifrax I LLC
•
Filing: 1956-03-12
•
Granted: 1959-05-19
•
Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B35/56; C04B35/565; C04B35/573
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD OF MAKING BONDED BORON NITRIDE ARTICLES OF MANUFACTURE WHICH COMPRISES FORMING AN ARTICLE OF THE DESIRED SHAPE FROM A MIXTURE CONSISTING ESSENTIALLY OF BORON NITRIDE PARTICLES AND 5% TO 7% BY WEIGHT OF FINELY DIVIDED SILICON, AND HEATING SAID ARTICLE IN AN ATMOSPHERE OF CARBON MONOXIDE AT A TEMPERATURE SUFFICIENT TO REACT THE CARBON MONOXIDE OF THE ATMOSPHERE WITH THE SILCON TO FORM SILICON CARBIDE AND THEREBY BOND THE BORON NITRIDE PARTICLES TOGETHER.
Claim 2
Independent Claim
75 words
A METHOD OF MAKING BONDED BORON NITRIDE ARTICLES OF MANUFACTURE WHICH COMPRISES FORMING AN ARTICLE OF THE DESIRED SHAPE FROM A MIXTURE CONSISTING ESSENTIALLY OF BORON NITRIDE PARTICLES AND 5% TO 7% BY WEIGHT OF FINELY DIVIDED SILICON, AND HEATING SAID ARTICLE IN AN ATMOSPHERE OF CARBON MONOXIDE AT A TEMPERATURE SUFFICIENT TO REACT THE CARBON MONOXIDE OF THE ATMOSPHERE WITH THE SILCON TO FORM SILICON CARBIDE AND THEREBY BOND THE BORON NITRIDE PARTICLES TOGETHER.
References Cited (Backward Citations)
US2108794A
Cited
US2109246A
Cited
US2119489A
Cited
GB478016A
Cited
US2431327A
Cited
US2636825A
Cited
US2609318A
Cited
US2636826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |