US3035325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making silicon carbide bodies
Assignee: Unifrax I LLC
•
Filing: 1958-02-21
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Granted: 1962-05-22
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Expires: 1978-02-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Nicholson
- 👤 Jr Stanley D Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:48
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/573; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C01B32/963; C01B32/984; Y; Y10; Y10S; Y10S148/00; Y10S148/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS OF IMPREGNATING A POROUS REFRACTORY ARTICLE WITH SILICON WHICH COMPRISES HEATING SAID ARTICLE IN AN INERT ATMOSPHERE IN THE PRESENCE OF SILICON NITRIDE, AT LEAST TO THE DECOMPOSITION TEMPERATURE OF SILICON NITRIDE,
Claim 2
Dependent Claim
34 words
A PROCESS OF IMPREGNATING A POROUS REFRACTORY ARTICLE WITH SILICON WHICH COMPRISES HEATING SAID ARTICLE IN AN INERT ATMOSPHERE IN THE PRESENCE OF SILICON NITRIDE, AT LEAST TO THE DECOMPOSITION TEMPERATURE OF SILICON NITRIDE,
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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |