US2890109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melting refractory metals
Assignee: Titanium Metals Corp
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Filing: 1958-05-05
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Granted: 1959-06-09
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Expires: 1978-05-05
Abstract
No abstract record available.
Inventors
- 👤 Donald E Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:53
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
IN A METHOD FOR ARC MELTING A CONSUMABLE ELECTRODE OF A REFRACTORY METAL TO PRODUCE AN INGOT, THE IMPROVEMENT WHICH COMPRISES; FORMING SAID ELECTRODE HAVING A BODY PORTION JOINED TO A NECK PORTION OF DIAMETER BETWEEN ONE-HALF AND ONE-THIRD OF THE DIAMETER OF SAID BODY PORTION, ARC MELTING SAID BODY PORTION OF SAID ELECTRODE EMPLOYING ELECTRIC CURRENT WITHIN THE RANGE BETWEEN 500 AND 1500 AMERES PER INCH OF ELECTRODE BODY DIAMETER, AND WHEN THE ELECTRODE HAS BEEN CONSUMED TO THE JUNCTURE OF THE BODY AND NECK PORTION REDUCING THE ELECTRIC CURRENT EMPLOYED TO PROVIDE AMPERES PER INCH OF NECK DIAMETER BETWEEN THE SAME AND ONE-SIXTH OF THE AMPERES PER INCH OF DIAMETER USED WHILE MELTING THE BODY PORTION AND EMPLOYING THE UPPER PORTION OF THE RANGE OF NECK MELTING AMPERAGE WHEN THE BODY HAS BEEN MELTED USING CURRENT WITHIN THE UPPER PORTION OF THE AMPERAGE RANGE, AND CONTINUING TO MELT THE NECK PORTION OF SAID ELECTRODE EMPLOYING SAID REDUCED CURRENT UNTIL SUFFICIENT NECK PORTION METAL HAS BEEN MELTED TO AT LEAST REPLACE THE SHRINKAGE VOLUME IN THE TOP OF THE INGOT PRODUCED BY MELTING THE BODY PORTION OF SAID ELECTRODE.
Claim 2
Dependent Claim
190 words
IN A METHOD FOR ARC MELTING A CONSUMABLE ELECTRODE OF A REFRACTORY METAL TO PRODUCE AN INGOT, THE IMPROVEMENT WHICH COMPRISES; FORMING SAID ELECTRODE HAVING A BODY PORTION JOINED TO A NECK PORTION OF DIAMETER BETWEEN ONE-HALF AND ONE-THIRD OF THE DIAMETER OF SAID BODY PORTION, ARC MELTING SAID BODY PORTION OF SAID ELECTRODE EMPLOYING ELECTRIC CURRENT WITHIN THE RANGE BETWEEN 500 AND 1500 AMERES PER INCH OF ELECTRODE BODY DIAMETER, AND WHEN THE ELECTRODE HAS BEEN CONSUMED TO THE JUNCTURE OF THE BODY AND NECK PORTION REDUCING THE ELECTRIC CURRENT EMPLOYED TO PROVIDE AMPERES PER INCH OF NECK DIAMETER BETWEEN THE SAME AND ONE-SIXTH OF THE AMPERES PER INCH OF DIAMETER USED WHILE MELTING THE BODY PORTION AND EMPLOYING THE UPPER PORTION OF THE RANGE OF NECK MELTING AMPERAGE WHEN THE BODY HAS BEEN MELTED USING CURRENT WITHIN THE UPPER PORTION OF THE AMPERAGE RANGE, AND CONTINUING TO MELT THE NECK PORTION OF SAID ELECTRODE EMPLOYING SAID REDUCED CURRENT UNTIL SUFFICIENT NECK PORTION METAL HAS BEEN MELTED TO AT LEAST REPLACE THE SHRINKAGE VOLUME IN THE TOP OF THE INGOT PRODUCED BY MELTING THE BODY PORTION OF SAID ELECTRODE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |