US5352523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite/carbon articles for elevated temperature service and method of manufacture
Assignee: Air Products and Chemicals Inc
•
Filing: 1992-05-08
•
Granted: 1994-10-04
•
Expires: 2012-05-08
Abstract
Abstract Graphite carbon surfaces are protected from elevated temperature oxidation and mechanical wear by electric arc thermal spray coating exposed surfaces with a titanium nitride or multi-element (e.g., aluminum-silicon-titanium) coating.
Inventors
- 👤 Zbigniew Zurecki
- 👤 Edward A. Hayduk, Jr.
- 👤 John G. North
- 👤 Robert B. Swan
- 👤 David L. Mitchell, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:16
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05B7/085; C; C23; C23C; C23C4/00; C23C4/12; C23C4/131; H01; H01R; H01R43/00; H01R43/12; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
An electric arc furnace electrode comprising a generally elongated cylindrical graphite body having a first end with a projection adapted to securely mate with a complimentary shaped receptacle on a second end of another like electrode and a second end having said shaped receptacle therein, the major portion of the body coated with an electric arc thermal sprayed coating consisting essentially of titanium nitride said coating having a thickness of at least 0.002 inches with a ratio of titanium to nitrogen of between 1 and 2, said coating applied by electric arc thermal spraying of titanium wire in ambient air using nitrogen gas as the atomizing/propelling gas.
Claim 2
Dependent Claim
107 words
An electric arc furnace electrode comprising a generally elongated cylindrical graphite body having a first end with a projection adapted to securely mate with a complimentary shaped receptacle on a second end of another like electrode and a second end having said shaped receptacle therein, the major portion of the body coated with an electric arc thermal sprayed coating consisting essentially of titanium nitride said coating having a thickness of at least 0.002 inches with a ratio of titanium to nitrogen of between 1 and 2, said coating applied by electric arc thermal spraying of titanium wire in ambient air using nitrogen gas as the atomizing/propelling gas.
Claim 3
Dependent Claim
88 words
An electric arc furnace electrode comprising a generally elongated cylindrical graphite body having a first end with a projection adapted to securely mate with a complementary shaped receptacle on a second end of another like electrode and a second end having said shaped receptacle therein, the major portion of the body coated with an electric arc thermal sprayed coating consisting essentially of a mixture of titanium nitride and titanium-aluminum-silicon nitride, said coating applied by electric arc thermal spraying of a titanium wire and wire of aluminum-silicon atomizing/propelling gas.
Claim 4
Dependent Claim
88 words
An electric arc furnace electrode comprising a generally elongated cylindrical graphite body having a first end with a projection adapted to securely mate with a complementary shaped receptacle on a second end of another like electrode and a second end having said shaped receptacle therein, the major portion of the body coated with an electric arc thermal sprayed coating consisting essentially of a mixture of titanium nitride and titanium-aluminum-silicon nitride, said coating applied by electric arc thermal spraying of a titanium wire and wire of aluminum-silicon atomizing/propelling gas.
References Cited (Backward Citations)
US1098794A
Cited
US3771976A
Cited
JPS5617914A
Cited
US4469801A
Cited
USRE32111E
Cited
US4525415A
Cited
US4599281A
Cited
JPS5939784A
Cited
US4540596A
Cited
US4675206A
Cited
US4753854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |