US3853544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant steels having improved weldability
Assignee: Nippon Steel Corp
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Filing: 1972-07-05
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Granted: 1974-12-10
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Expires: 1992-07-05
Abstract
Abstract Corrosion resistant steels having improved weldability particularly sea-water resistant steels comprising 0.001 - 0.25 percent of carbon, 0.7 - 1.1 percent of silicon, 0.3 - 2.0 percent of manganese, 0.5 - 2.0 percent of chromium, 0.1 - 1.5 percent of molybdenum. 0.1 - 0.29 percent of copper, less than 0.04 percent of phosphorus, two or more elements selected from the group consisting of arsenic, tin, beryllium, bismuth, lead, germanium, antimony, selenium and tellurium in an amount of 0.02 - 0.20 percent each, the balance being iron and unavoidable impurities.
Inventors
- 👤 T Nishi
- 👤 T Watanabe
- 👤 H Shimada
- 👤 K Miida
- 👤 T Okazaki
- 👤 H Masumoto
- 👤 T Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:37
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A CORROSION RESISTANT STEEL HAVING IMPROVED WELDABILITY CONSISTING OF 0.001-0.25 PERCENT BY WEIGHT OF CARBON, 0.70 -1.1 PERCENT BY WEIGHT OF SILICON, 0.3-2.0 PERCENT BY WEIGHT OF MANGANESE, 0.5-2.0 PERCENT BY WEIGHT OF CHROMINUM, 0.1 -1.5 PERCENG BY WEIGHT OF MOLYBDENUM, 0.1-0.29 PERCENT BY WEIGHT OF COPPER, LESS THAN 0.04 PERCENT BY WEIGHT OF PHOSPHORUS, AND TWO OR MORE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF ARSENIC, TIN, BERYLLIUM, BISMUTH, LEAD, GERMANIUM, ANTIMONY, SELENIUM AND TELLURIUM IN AN AMOUNT OF 0.02-0.20 PERCENT BY WEIGHT EACH, THE BALANCE BEING IRON AND UNAVOIDABLE IMPURITIES.
Claim 2
Dependent Claim
92 words
A CORROSION RESISTANT STEEL HAVING IMPROVED WELDABILITY CONSISTING OF 0.001-0.25 PERCENT BY WEIGHT OF CARBON, 0.70 -1.1 PERCENT BY WEIGHT OF SILICON, 0.3-2.0 PERCENT BY WEIGHT OF MANGANESE, 0.5-2.0 PERCENT BY WEIGHT OF CHROMINUM, 0.1 -1.5 PERCENG BY WEIGHT OF MOLYBDENUM, 0.1-0.29 PERCENT BY WEIGHT OF COPPER, LESS THAN 0.04 PERCENT BY WEIGHT OF PHOSPHORUS, AND TWO OR MORE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF ARSENIC, TIN, BERYLLIUM, BISMUTH, LEAD, GERMANIUM, ANTIMONY, SELENIUM AND TELLURIUM IN AN AMOUNT OF 0.02-0.20 PERCENT BY WEIGHT EACH, THE BALANCE BEING IRON AND UNAVOIDABLE IMPURITIES.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |