Patent US2991192A successfully refreshed from Google Patents.
US2991192A
Expired / Lapsed
US
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Process of coating graphite with niobium-titanium carbide
Assignee: Individual
•
Filing: 1958-10-30
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Granted: 1961-07-04
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Expires: 1978-10-30
Abstract
No abstract record available.
Inventors
- 👤 Frank A Halden
- 👤 William D Smiley
- 👤 Frank M Hruz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:05
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5053; C04B41/5057; C04B41/80; C04B41/81; C04B41/85; C04B41/87
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN AN IMPROVED METHOD FOR REACTING NIOBIUM WITH GRAPHITE TO PRODUCE AN ADHERENT REFRACTORY COATING HAVING NIOBIUM ON THE EXTERIOR SURFACE THEREOF, COMPRISING THE STEPS OF PRODUCING FINELY DIVIDED POWDERS INCLUDING INTIMATELY MIXED NIOBIUM AND TITANIUM, CONTACTING GRAPHITE WITH SAID POWDERS, DEGASSING SAID METALS AND GRAPHITE, HEATING SAID MATERIALS TO A TEMPERATURE OF 2350*C. TO ACHIEVE MELTING OF THE METAL POWDERS AND THEREAFTER COOLING SAID MATERIALS.
Claim 2
Dependent Claim
66 words
IN AN IMPROVED METHOD FOR REACTING NIOBIUM WITH GRAPHITE TO PRODUCE AN ADHERENT REFRACTORY COATING HAVING NIOBIUM ON THE EXTERIOR SURFACE THEREOF, COMPRISING THE STEPS OF PRODUCING FINELY DIVIDED POWDERS INCLUDING INTIMATELY MIXED NIOBIUM AND TITANIUM, CONTACTING GRAPHITE WITH SAID POWDERS, DEGASSING SAID METALS AND GRAPHITE, HEATING SAID MATERIALS TO A TEMPERATURE OF 2350*C. TO ACHIEVE MELTING OF THE METAL POWDERS AND THEREAFTER COOLING SAID MATERIALS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |