US3818564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacture of self-lubricating, wear-resistant composite material
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1972-11-29
•
Granted: 1974-06-25
•
Expires: 1992-11-29
Abstract
Abstract Disclosed is a method for manufacturing a self-lubricating, wear-resistant composite material by compressing a tiered array of copper nets, burning the molded skeleton in a vacuum and impregnating the sintered skeleton with a solid lubricant.
Inventors
- 👤 Y Tsuya
- 👤 H Shimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:57
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/002; B22F3/24; B22F3/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49702
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
18 words
A method according to claim 1, wherein the metal nets have a coarseness of 25 - 75 mesh.
Claim 2
Dependent Claim
18 words
A method according to claim 1, wherein the porosity of the sintered skeleton is 25 - 45 percent.
Claim 3
Independent Claim
38 words
A method of making a self-lubricating, wear-resistant composite material, comprising the steps of compressing a tiered array of copper nets, sintering the resultant molded skeleton at about 800*C. and impregnating the resultant sintered skeleton with a solid lubricant.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |