Patent US3776705A successfully refreshed from Google Patents.
US3776705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered alloy having wear resistance at high temperature
Assignee: Individual
•
Filing: 1971-08-17
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Granted: 1973-12-04
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Expires: 1991-08-17
Abstract
Abstract The present invention relates to sintered alloys having wear resistance at high temperature composed of 5 to 15 percent tin and 4 to 25 percent chromium, the balance being copper, and the alloy being sintered to more than 88 percent of theoretical density ratio.
Inventors
- 👤 K Ishihara
- 👤 Y Serino
- 👤 S Mitani
- 👤 K Imanishi
- 👤 K Hashimoto
- 👤 K Shitani
- 👤 I Niimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:30
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/02; C; C22; C22C; C22C1/00; C22C1/04; C22C1/0425; C22C9/00; C22C9/02; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49306
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
A valve seat of an internal combustion engine fabricated of the alloy according to claim 1.
References Cited (Backward Citations)
US1937465A
Cited
GB445620A
Cited
US2059555A
Cited
US2075444A
Cited
US2753859A
Cited
US2847789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |