US3144690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exothermically reacting shaped products for use in foundry practice
Assignee: Foseco International Ltd
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Filing: 1961-07-17
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Granted: 1964-08-18
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 William T Buckingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:23
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; B; B22; B22D; B22D7/00; B22D7/06; B22D7/10; B22D7/104; C22B5/06; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/114
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A MOLDED EXOTHERMICALLY REACTING SHAPED ARTICLE HAVING THIN WALLS WITH A HEIGHT TO THICKNESS RATIO OF GREATER THAN ABOUT 9, COMPRISING AN EXOTHERRMICALLY REACTING COMPOSITION CONSISTING ESSENTIALLY OF AN ALUMINOTHERMIC COMPOSITION OF 15 TO 50% BY WEIGHT OF FINELY DIVIDED ALUMINUM, AN OXIDIZING AGENT FOR THE ALUMINUM IN A QUANTITY STOICHIOMETRICALLY INSUFFICIENT TO COMBINE WITH ALL OF THE ALUMINUM PRESENT, 2 TO 9% OF A BINDER, 3.1 TO 3% BY WEIGHT OF METAL FLOCK INTIAMTELY DISPERSED THEREIN AND THE RESIDUE BEING SUBSTANTIALLY A REFRACTORY FILLER, THE SAID METAL FLOCK BEING FORMED OF METAL FIBRES OF DIAMETER AT MOST ABOUT 3.5 MM. AND LENGTH ABOUT 5 TO ABOUT 30 MM.
References Cited (Backward Citations)
US2391855A
Cited
GB627678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |