US3359449A
Expired / Lapsed
US
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Multiple section graphite electrode
Assignee: Airco Inc
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Filing: 1964-10-27
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Granted: 1967-12-19
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Expires: 1984-10-27
Abstract
No abstract record available.
Inventors
- 👤 Robert B Trask
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:09
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/14; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10T; Y10T403/00; Y10T403/21; Y10T403/55; Y10T403/556
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A THREAD NIPPLE FOR GRAPHITE ELECTRODE ASSEMBLIES CONSISTING OF GRAPHITE MODIFIED WITH 0.5% TO 8% BY WEIGHT OF BORON DISPERSED THROUGHOUT TO IMPART TO SAID NIPPLE A COEFFICIENT OF THERMAL EXPANSION WITHIN THE RANGE OF FROM 1.5X10**-6/*C. TO 4.0X10**-6/*C.
Claim 2
Dependent Claim
39 words
A THREAD NIPPLE FOR GRAPHITE ELECTRODE ASSEMBLIES CONSISTING OF GRAPHITE MODIFIED WITH 0.5% TO 8% BY WEIGHT OF BORON DISPERSED THROUGHOUT TO IMPART TO SAID NIPPLE A COEFFICIENT OF THERMAL EXPANSION WITHIN THE RANGE OF FROM 1.5X10**-6/*C. TO 4.0X10**-6/*C.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |