Patent US2943932A successfully refreshed from Google Patents.
US2943932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boron-containing ferrous metal having as-cast compacted graphite
Assignee: Motors Liquidation Co
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Filing: 1957-06-10
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Granted: 1960-07-05
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Expires: 1977-06-10
Abstract
No abstract record available.
Inventors
- 👤 Philip R White
- 👤 Robert F Thomson
- 👤 Carl F Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:25
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A FERROUS METAL HAVING HIGH TENSILE STRENGHT AND A MODULUS OF ELASTICITY OF AT LEAST 27 MILLION P.S.I., SAID METAL COMPRISING APPROXIMATELY 1% TO 2.5% CARBON, 1.5% TO 3.2% SILICON, 0.001% TO 0.05% PREDOMINANTLY ACID-INSOLUBLE BORON AND THE BALANCE SUBSTANTIALLY ALL IRON, SAID METAL BEING CHARACTERIZED IN THE "AS-CAST" CONDITION BY A MICROSTRUCTURE HAVING CARBON IN THE FORM OF COMPACTED GRAPHITE AND IN THE ABSENCE OF BORON HAVING A WHITE IRON "AS-CAST" MICROSTRUCTURE.
Claim 2
Dependent Claim
73 words
A FERROUS METAL HAVING HIGH TENSILE STRENGHT AND A MODULUS OF ELASTICITY OF AT LEAST 27 MILLION P.S.I., SAID METAL COMPRISING APPROXIMATELY 1% TO 2.5% CARBON, 1.5% TO 3.2% SILICON, 0.001% TO 0.05% PREDOMINANTLY ACID-INSOLUBLE BORON AND THE BALANCE SUBSTANTIALLY ALL IRON, SAID METAL BEING CHARACTERIZED IN THE "AS-CAST" CONDITION BY A MICROSTRUCTURE HAVING CARBON IN THE FORM OF COMPACTED GRAPHITE AND IN THE ABSENCE OF BORON HAVING A WHITE IRON "AS-CAST" MICROSTRUCTURE.
Claim 3
Dependent Claim
106 words
A FERROUS METAL HAVING HIGH TENSILE STRENGTH AND A MODULUS OF ELASTICITY OF AT LEAST 27 MILLION P.S.I., SAID METAL COMPRISING APPROXIMATELY 1% TO 2.5% CARBON, 1.5% TO 3.2% SILICON, 0.001% TO 0.05% PREDOMINANTLY ACID-INSOLUBLE BORON, A SMALL AMOUNT NOT IN EXCESS OF ABOUT 0.02% OF AN ADDITIVE SELECTED FROM THE CLASS CONSISTING OF TELLURIUM AD BISMUTH, AND THE BALANCE SUBSTANTIALLY ALL IRON, SAID ADDITIVE BEING PRESENT IN AN AMOUNT SUFFICIENT TO INSURE THAT SAID FERROUS METAL HAS AN "AS-CAST" MICROSTRUCTURE WITH FREE CARBON SUBSTANTIALLY ALL IN THE FORM OF COMPACTED GRAPHITE, SAID FERROUS METAL IN THE ABSENCE OF BORON HAVING A WHITE IRON "AS-EAST" MICROSTRUCTURE.
Claim 4
Dependent Claim
106 words
A FERROUS METAL HAVING HIGH TENSILE STRENGTH AND A MODULUS OF ELASTICITY OF AT LEAST 27 MILLION P.S.I., SAID METAL COMPRISING APPROXIMATELY 1% TO 2.5% CARBON, 1.5% TO 3.2% SILICON, 0.001% TO 0.05% PREDOMINANTLY ACID-INSOLUBLE BORON, A SMALL AMOUNT NOT IN EXCESS OF ABOUT 0.02% OF AN ADDITIVE SELECTED FROM THE CLASS CONSISTING OF TELLURIUM AD BISMUTH, AND THE BALANCE SUBSTANTIALLY ALL IRON, SAID ADDITIVE BEING PRESENT IN AN AMOUNT SUFFICIENT TO INSURE THAT SAID FERROUS METAL HAS AN "AS-CAST" MICROSTRUCTURE WITH FREE CARBON SUBSTANTIALLY ALL IN THE FORM OF COMPACTED GRAPHITE, SAID FERROUS METAL IN THE ABSENCE OF BORON HAVING A WHITE IRON "AS-EAST" MICROSTRUCTURE.
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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |