US3201232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of steel involving prolonged stressing at elevated temperatures
Assignee: Gebrueder Boehler and Co AG
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Filing: 1962-03-29
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Granted: 1965-08-17
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Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Hermann W R Thier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:48
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/22; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/308
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A STEEL ALLOY HAVING A HIGH CREEP RESISTANCE FOR VERY LONG TIME INTERVALS UP TO 100,000 HOURS AND GOOD CORROSION RESISTANCE IN USES WHEREIN SAID STEEL IS STRESSED FOR PROLONGED PERIODS OF TIME AT TEMPERATURES EXCEEDING 500* C., CONSISTING ESSENTIALLY OF 0.12-0.25% CARBON, 7.5-8.5% CHROMIUM, 1.5-2.5% MOLYBDENUM AND UP TO 3% OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF VANADIUM, TUNGSTEN, TITANIUM, BORON, COLUMBIUM, TANTALUM, NITROGEN, COBALT, AND MIXTURES THEREOF, THE BALANCE BEING IRON AND THE USUAL IMPURITIES INCLUDING SILICON, MANGANESE, SULFUR AND PHOSPHORUS, THERE BEING LESS THAN 0.2% SULFUR, LESS THAN 0.02% PHOSPHORUS AND LESS THAN 0.3% SILICON IN SAID ALLOY.
Claim 2
Dependent Claim
103 words
A STEEL ALLOY HAVING A HIGH CREEP RESISTANCE FOR VERY LONG TIME INTERVALS UP TO 100,000 HOURS AND GOOD CORROSION RESISTANCE IN USES WHEREIN SAID STEEL IS STRESSED FOR PROLONGED PERIODS OF TIME AT TEMPERATURES EXCEEDING 500* C., CONSISTING ESSENTIALLY OF 0.12-0.25% CARBON, 7.5-8.5% CHROMIUM, 1.5-2.5% MOLYBDENUM AND UP TO 3% OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF VANADIUM, TUNGSTEN, TITANIUM, BORON, COLUMBIUM, TANTALUM, NITROGEN, COBALT, AND MIXTURES THEREOF, THE BALANCE BEING IRON AND THE USUAL IMPURITIES INCLUDING SILICON, MANGANESE, SULFUR AND PHOSPHORUS, THERE BEING LESS THAN 0.2% SULFUR, LESS THAN 0.02% PHOSPHORUS AND LESS THAN 0.3% SILICON IN SAID ALLOY.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |