US2746860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature co-cr alloys
Assignee: Union Carbide Corp
•
Filing: 1952-11-21
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Granted: 1956-05-22
•
Expires: 1972-11-21
Abstract
No abstract record available.
Inventors
- 👤 William O Binder
- 👤 Jr Frederick C Kroft
- 👤 Glenn A Fritzlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:51
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A COBALT-BASE ALLOY CAPABLE OF WITHSTANDING PROLONGED EXPOSURE TO MECHANICAL STRESS OF AT LEAST 31,500 POUNDS PER SQUARE INCH AT ELEVATED TEMPERATURES OF THE ORDER OF 1,500* F. AND ABOVE, SAID ALLOY CONTAINING 23% TO 36% CHROMIUM; 12% TO 16% TUNGSTEN; UP TO 3% MOLYBDENUM, THE SUM OF TUNGSTEN AND MOLYBDENUM NOT EXCEEDING 16%; 2% TO 15% NICKEL; 0.25% TO LESS THAN 2% MANGANESE; 0.3% TO 0.9% CARBON; UP TO 1% SILICON; UP TO 0.25% NITROGEN; LESS THAN 5% IRON; 0.25% TO 1.0% BORON, THE REMAINDER COBALT, THE COMPOSITION OF SAID ALLOY BEING SO BALANCED THAT WHEN ITS CHROMIUM CONTENT IS IN THE RANGE 23% TO 30% ITS CARBON CONTENT IS 0.30% TO LESS THAN 0.5%, ITS BORON CONTENT IS 0.25% TO 0.8% AND ITS MINIMUM COBALT CONTENT IS 45%; AND WHEN ITS CHROMIUM CONTENT IS IN THE RANGE 30% TO 36% ITS CARBON CONTENT IS 0.5% TO 0.9%, ITS BORON CONTENT IS 0.8% TO 1.0%, AND ITS MINIMUM COBALT CONTENT IS 35%.
Claim 2
Dependent Claim
163 words
A COBALT-BASE ALLOY CAPABLE OF WITHSTANDING PROLONGED EXPOSURE TO MECHANICAL STRESS OF AT LEAST 31,500 POUNDS PER SQUARE INCH AT ELEVATED TEMPERATURES OF THE ORDER OF 1,500* F. AND ABOVE, SAID ALLOY CONTAINING 23% TO 36% CHROMIUM; 12% TO 16% TUNGSTEN; UP TO 3% MOLYBDENUM, THE SUM OF TUNGSTEN AND MOLYBDENUM NOT EXCEEDING 16%; 2% TO 15% NICKEL; 0.25% TO LESS THAN 2% MANGANESE; 0.3% TO 0.9% CARBON; UP TO 1% SILICON; UP TO 0.25% NITROGEN; LESS THAN 5% IRON; 0.25% TO 1.0% BORON, THE REMAINDER COBALT, THE COMPOSITION OF SAID ALLOY BEING SO BALANCED THAT WHEN ITS CHROMIUM CONTENT IS IN THE RANGE 23% TO 30% ITS CARBON CONTENT IS 0.30% TO LESS THAN 0.5%, ITS BORON CONTENT IS 0.25% TO 0.8% AND ITS MINIMUM COBALT CONTENT IS 45%; AND WHEN ITS CHROMIUM CONTENT IS IN THE RANGE 30% TO 36% ITS CARBON CONTENT IS 0.5% TO 0.9%, ITS BORON CONTENT IS 0.8% TO 1.0%, AND ITS MINIMUM COBALT CONTENT IS 35%.
References Cited (Backward Citations)
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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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |