Patent US2768892A successfully refreshed from Google Patents.
US2768892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-aging steel
Assignee: Jones and Laughlin Steel Corp
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Filing: 1955-05-26
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Granted: 1956-10-30
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Expires: 1975-05-26
Abstract
No abstract record available.
Inventors
- 👤 Louis R Shoenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:50
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD OF MAKING NON-AGING STEEL COMPRISING PREPARING A MELT OF LOW-CARBON STEEL, ADDING THERETO ALUMINUM IN AMOUNT NOT LESS THAN THREE-QUARTERS OF A POUND PER TON BUT LESS THAN THAT AMOUNT REQUIRED TO DEOXIDIZE SAID STEEL FULLY AND BORON IN AMOUNT NOT LESS THAN THREEQUARTERS OF A POUND PER TON BUT LESS THAN ONE POUND PER TON.
Claim 2
Independent Claim
58 words
A METHOD OF MAKING NON-AGING STEEL COMPRISING PREPARING A MELT OF LOW-CARBON STEEL, ADDING THERETO ALUMINUM IN AMOUNT NOT LESS THAN THREE-QUARTERS OF A POUND PER TON BUT LESS THAN THAT AMOUNT REQUIRED TO DEOXIDIZE SAID STEEL FULLY AND BORON IN AMOUNT NOT LESS THAN THREEQUARTERS OF A POUND PER TON BUT LESS THAN ONE POUND PER TON.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |