US3248346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant and oxidation-proof materials containing molybdenum disilicide
Assignee: Kanthal AB
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Filing: 1962-10-16
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Granted: 1966-04-26
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Expires: 1982-10-16
Abstract
No abstract record available.
Inventors
- 👤 Amberg Styrbjorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/58085; C04B35/58092; H; H01; H01B; H01B1/00; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/148; H05B2203/00; H05B2203/018
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
A HEAT-RESISTANT AND OXIDATION-PROOF MATERIAL, SUITABLE AS AN ELECTRICAL RESISTANCE ELEMENT FOR TEMPERATURES ABOVE 1400*C., CONSISTING ESSENTIALLY OF MOSI2 AND CONTAINING A MINOR AMOUNT OF SIO2, SUCH MATERIAL ALSO INCLUDING AT LEAST 0.01% BY WEIGHT OF NITROGEN IN THE FORM OF A STABLE INORGANIC NITROGEN COMPOUND WHICH WITHSTANDS HIGH TEMPERATURE IN AIR AND OF WHICH ANY SI3N4 PRESENT CONSTITUTES AT THE MOST 1% BY WEIGHT OF THE MATERIAL.
Claim 2
Dependent Claim
68 words
A HEAT-RESISTANT AND OXIDATION-PROOF MATERIAL, SUITABLE AS AN ELECTRICAL RESISTANCE ELEMENT FOR TEMPERATURES ABOVE 1400*C., CONSISTING ESSENTIALLY OF MOSI2 AND CONTAINING A MINOR AMOUNT OF SIO2, SUCH MATERIAL ALSO INCLUDING AT LEAST 0.01% BY WEIGHT OF NITROGEN IN THE FORM OF A STABLE INORGANIC NITROGEN COMPOUND WHICH WITHSTANDS HIGH TEMPERATURE IN AIR AND OF WHICH ANY SI3N4 PRESENT CONSTITUTES AT THE MOST 1% BY WEIGHT OF THE MATERIAL.
Claim 3
Dependent Claim
14 words
THE COMPOSIITION OF CLAIM 1, IN WHICH SAID COMPOUND IS AN OXINITRIDE OF SILICON.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |