Patent US3773504A successfully refreshed from Google Patents.
US3773504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper base alloy having wear resistance at high temperatures
Assignee: Individual
•
Filing: 1971-08-31
•
Granted: 1973-11-20
•
Expires: 1991-08-31
Abstract
Abstract The present invention relates to copper base alloys having excellent seizure resistance and wear resistance at high temperatures containing copper as the principal constituent, and zinc (Zn), aluminum (Al), manganese (Mn), silicon (Si), chromium (Cr), and phosphorus (P) as alloy elements.
Inventors
- 👤 I Niimi
- 👤 Y Kaneko
- 👤 Y Komiyama
- 👤 Y Uchiyama
- 👤 Y Takeda
- 👤 S Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:21
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04; F; F16; F16C; F16C2204/00; F16C2204/10; F16C2204/14; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/12; F16C33/121
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
64 words
A copper base alloy as in claim 1 including additional elements of less than 2 percent of any element selected from the group consisting of iron and nickel, less than 1 percent of any element selected from the group consisting of tin, lead, titanium, zirconiuM, beryllium, boron, cobalt and tungsten and wherein the total sum of said additional elements is less than 5 percent.
Claim 2
Dependent Claim
16 words
A valve seat of an internal combustion engine fabricated of the alloy according to claim 1.
Claim 3
Dependent Claim
16 words
A valve seat of an internal combustion engine fabricated of the alloy according to claim 6.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |