US2731359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory fiber body and method of making same
Assignee: Unifrax I LLC
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Filing: 1952-08-22
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Granted: 1956-01-17
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Expires: 1972-08-22
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/591; C04B35/56; C04B35/565; C04B35/573; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/249921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF MAKING A LIGHT-WEIGHT REFRACTORY BODY WHICH COMPRISES FORMING A NON-WOVEN MASS OF REFRACTORY FIBERS WHICH ARE CAPABLE OF STANDING UP UNDER THE TEMPERATURES REQUIRED FOR CONVERTING SILICON POWDER TO THE DESIRED SILICIDE, INCORPORATING A SILICON POWDER WITHIN SAID MASS OF FIBERS, AND HEATING THE RESULRING MASS IN A NONOXIDIZING ATMOSPHERE SELECTED FROM THE GROUP CONSISTING OF A CARBONACEOUS ATMOSPHERE AND A NITROGEN-CONTAINING ATMOSPHERE TO CONVERT THE METALLIC SILICON TO A SILICIDE BOND AND THEREBY BOND THE REFRACTORY FIBERS TOGETHER AT THEIR POINTS OF CONTTACT.
Claim 2
Independent Claim
87 words
A METHOD OF MAKING A LIGHT-WEIGHT REFRACTORY BODY WHICH COMPRISES FORMING A NON-WOVEN MASS OF REFRACTORY FIBERS WHICH ARE CAPABLE OF STANDING UP UNDER THE TEMPERATURES REQUIRED FOR CONVERTING SILICON POWDER TO THE DESIRED SILICIDE, INCORPORATING A SILICON POWDER WITHIN SAID MASS OF FIBERS, AND HEATING THE RESULRING MASS IN A NONOXIDIZING ATMOSPHERE SELECTED FROM THE GROUP CONSISTING OF A CARBONACEOUS ATMOSPHERE AND A NITROGEN-CONTAINING ATMOSPHERE TO CONVERT THE METALLIC SILICON TO A SILICIDE BOND AND THEREBY BOND THE REFRACTORY FIBERS TOGETHER AT THEIR POINTS OF CONTTACT.
References Cited (Backward Citations)
US2618565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |