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Patent US3837816A successfully refreshed from Google Patents.
US3837816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal and abrasion resistant sintered alloy
Assignee: Nippon Piston Ring Co Ltd
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Filing: 1972-09-05
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Granted: 1974-09-24
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Expires: 1992-09-05
Abstract
Abstract An alloy prepared by adding 0.3 to 5 percent by weight of a ferrocarbide of an iron-carbon alloy containing one or more of carbide forming elements to a base comprising 0.6 to 2 percent of carbon, 0.5 to 5 percent of molybdenum, 6.0 to 15 percent of cobalt, 0.5 to 4 percent of nickel, by weight, and the balance iron and molding and sintering has large thermal resistance and abrasion resistance.
Inventors
- 👤 K Takahashi
- 👤 M Hasegawa
- 👤 K Nara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:29
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0207; C22C33/0257; C22C33/0278; C22C33/0285
Claims Analysis
Total Claims: 0
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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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |