US3663214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resistant cast iron
Assignee: MEEHANITE WORLDWIDE Corp
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Filing: 1970-02-16
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Granted: 1972-05-16
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Expires: 1990-02-16
Abstract
Abstract A wear and abrasion resistant white iron having a composition as follows: Total Carbon 3.0% to 4.0% Silicon 0.0% to 2.5% Manganese 7.0% to 15.0% Chromium 8.0% to 15.0% Other alloying constituents 0.0% to 5.0% AND HAVING A MICROSTRUCTURE OF PREDOMINANTLY CHUNKY OR NEEDLE CARBIDES IN A MATRIX PREDOMINANTLY AUSTENITIC.
Inventors
- 👤 William H Moore
- 👤 Harry H Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:05
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/06; C22C38/00; C22C38/18; C22C38/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
White iron in the composition range of: Total Carbon 3.0 to 4.0% Silicon 0 to 2.5% Manganese 7 to 15%Chromium 8 to 15% Other alloying constituents 0 to 5% and characterized by a microstructure of predominantly trigonal and orthorhombic chromium-manganese carbides in a matrix predominantly austenitic.
References Cited (Backward Citations)
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US1671384A
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US1860852A
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US1815187A
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US2075990A
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US2803538A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |