US2805145A
Expired / Lapsed
US
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Exothermic metallurgical composition and method of introducing same into ferrous alloy
Assignee: Mallinckrodt Chemical Works
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Filing: 1954-03-25
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Granted: 1957-09-03
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Expires: 1974-03-25
Abstract
No abstract record available.
Inventors
- 👤 Courtland M Henderson
- 👤 Martin George Lloyd
- 👤 Allan D Gott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:00
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; C21; C21B; C21B13/00; C22B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN EXOTHERMIC METALURGICAL COMPOSITION COMPRISING BETWEEN APPROXIMATELY 10% AND 43% BY WEIGHT OF TITANIUM DIOXIDE, AT LEAST APPROXIMATELY 10% BY WEIGHT OF A REDUCING AGENT FOR TITANIUM DIOXIDE AND AT LEAST APPROXIMATELY 18% BY WEIGHT OF A SOURCE OF BASIC OXIDE, SAID COMPOSITION FORMING UPON IGNITION A PRODUCT CONTAINING AT LEAST ONE ACIDIC OXIDE, SAID PRODUCT REMAINING FLUID AT A TEMPERATURE OF APPROXIMATELY 2600*F. AFTER ABSORBING AT LEAST APPROXIMATELY 15% OF ITS WEIGHT OF TITANIUM DIOXIDE, SAID REDUCING AGENT AND SAID SOURCE OF BASIC OXIDE REACTING UPON INGNITION TO REDUCE A SUBSTANTIAL PORTION OF THE TITANIUM DIOXIDE OF TITANIUM METAL.
Claim 2
Dependent Claim
100 words
AN EXOTHERMIC METALURGICAL COMPOSITION COMPRISING BETWEEN APPROXIMATELY 10% AND 43% BY WEIGHT OF TITANIUM DIOXIDE, AT LEAST APPROXIMATELY 10% BY WEIGHT OF A REDUCING AGENT FOR TITANIUM DIOXIDE AND AT LEAST APPROXIMATELY 18% BY WEIGHT OF A SOURCE OF BASIC OXIDE, SAID COMPOSITION FORMING UPON IGNITION A PRODUCT CONTAINING AT LEAST ONE ACIDIC OXIDE, SAID PRODUCT REMAINING FLUID AT A TEMPERATURE OF APPROXIMATELY 2600*F. AFTER ABSORBING AT LEAST APPROXIMATELY 15% OF ITS WEIGHT OF TITANIUM DIOXIDE, SAID REDUCING AGENT AND SAID SOURCE OF BASIC OXIDE REACTING UPON INGNITION TO REDUCE A SUBSTANTIAL PORTION OF THE TITANIUM DIOXIDE OF TITANIUM METAL.
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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |