US3201231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steels
Assignee: Universal Cyclops Steel Corp
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Filing: 1961-11-21
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Granted: 1965-08-17
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Norman R Harpster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:24
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A STRAIGHT CHROME FERRITIC STAINLESS STEEL CONSISTING ESSENTIALLY, BY WEIGHT, OF 18.41 PERCENT OF CHROMIUM, 0.065 PERCENT OF CARBON, 0.57 PERCENT OF MANGANESE, 0.44 PERCENT OF SILICON, 0.0007 PERCENT OF SULFUR, 0.018 PERCENT OF PHOSPHORUS, 0.89 PERCENT OF MOLYBDENUM AND THE REMAINDER IRON, SAID FERRITIC STAINLESS STEEL BEING CHARACTERIZED BY IMPROVED CORROSION RESISTANCE.
Claim 2
Dependent Claim
53 words
A STRAIGHT CHROME FERRITIC STAINLESS STEEL CONSISTING ESSENTIALLY, BY WEIGHT, OF 18.41 PERCENT OF CHROMIUM, 0.065 PERCENT OF CARBON, 0.57 PERCENT OF MANGANESE, 0.44 PERCENT OF SILICON, 0.0007 PERCENT OF SULFUR, 0.018 PERCENT OF PHOSPHORUS, 0.89 PERCENT OF MOLYBDENUM AND THE REMAINDER IRON, SAID FERRITIC STAINLESS STEEL BEING CHARACTERIZED BY IMPROVED CORROSION RESISTANCE.
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 |