Patent US2819956A successfully refreshed from Google Patents.
US2819956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition agent for and method of treating steel
Assignee: Vanadium Corp of America
•
Filing: 1955-09-15
•
Granted: 1958-01-14
•
Expires: 1975-09-15
Abstract
No abstract record available.
Inventors
- 👤 Strauss Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:23
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
AN ADDITION AGENT FOR THE TREATMENT OF STEEL, CONTAINING 0.3 TO 3.0% SILICON, UP TO 1% TITANIUM, UP TO 6% MANGANESE, UP TO 0.5% ALKALI METALS AND UP TO A TOTAL AMOUNT OF IRON AND MANGANESE OF 20%, THE REMAINDER CONSISTING OF CALCIUM AND ALUMINUM IN THE RANGE OF RATIOS OF CALCIUM TO ALUMINUM OF 1.00:1 TO 1.75:1.
Claim 2
Dependent Claim
58 words
AN ADDITION AGENT FOR THE TREATMENT OF STEEL, CONTAINING 0.3 TO 3.0% SILICON, UP TO 1% TITANIUM, UP TO 6% MANGANESE, UP TO 0.5% ALKALI METALS AND UP TO A TOTAL AMOUNT OF IRON AND MANGANESE OF 20%, THE REMAINDER CONSISTING OF CALCIUM AND ALUMINUM IN THE RANGE OF RATIOS OF CALCIUM TO ALUMINUM OF 1.00:1 TO 1.75:1.
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) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |