US2978358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining uniform coatings on graphite
Assignee: Individual
•
Filing: 1958-03-28
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Granted: 1961-04-04
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Expires: 1978-03-28
Abstract
No abstract record available.
Inventors
- 👤 Ivor E Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:48
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
103 words
A METHOD OF FORMING UNIFORM CARBIDE COATINGS ON GRAPHITE COMPRISING PASSING VAPORS OF A VOLATILE METALLIC HALIDE SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM TETRAIODIDE, ZIRCONIUM TETRABROMIDE, ZIRCONIUM TETRACHLORIDE, TANTALUM PENTABROMIDE, TANTALUM PENTACHLORIDE, NIOBIUM PENTABROMIDE AND NIOBIUM PENTACHLORIDE OVER THE GRAPHITE UNDER CONDITIONS OF TEMPERATURE AND PRESSURE DEFINED BY THE AREA BETWEEN THE CURVES SHOWING LIMITING PRESSURES FOR FORMATION OF THE CARBIDE BEING FORMED AND FOR THERMAL DECOMPOSITION OF THE HALIDE EMPLOYED SHOWN IN FIGS. 3 TO 5 OF THE DRAWINGS WHEREBY DECOMPOSITION OF THE HALIDE IS INHIBITED AND THE HALIDE AND GRAPHITE REACT TO FORM A METALLIC CARBIDE COATING ON THE GRAPHITE.
Claim 2
Independent Claim
103 words
A METHOD OF FORMING UNIFORM CARBIDE COATINGS ON GRAPHITE COMPRISING PASSING VAPORS OF A VOLATILE METALLIC HALIDE SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM TETRAIODIDE, ZIRCONIUM TETRABROMIDE, ZIRCONIUM TETRACHLORIDE, TANTALUM PENTABROMIDE, TANTALUM PENTACHLORIDE, NIOBIUM PENTABROMIDE AND NIOBIUM PENTACHLORIDE OVER THE GRAPHITE UNDER CONDITIONS OF TEMPERATURE AND PRESSURE DEFINED BY THE AREA BETWEEN THE CURVES SHOWING LIMITING PRESSURES FOR FORMATION OF THE CARBIDE BEING FORMED AND FOR THERMAL DECOMPOSITION OF THE HALIDE EMPLOYED SHOWN IN FIGS. 3 TO 5 OF THE DRAWINGS WHEREBY DECOMPOSITION OF THE HALIDE IS INHIBITED AND THE HALIDE AND GRAPHITE REACT TO FORM A METALLIC CARBIDE COATING ON THE GRAPHITE.
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) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |