US3829295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered iron based articles infiltrated with copper based metals
Assignee: Federal Mogul Coventry Ltd
•
Filing: 1972-10-13
•
Granted: 1974-08-13
•
Expires: 1992-10-13
Abstract
Abstract A SINTERED METAL ARTICLE INCLUDING A SINTERED SKELECTION HAVING THE COMPOSITION 1.5-2.0% NICKEL, 0.3-0.7% MOLYBEDNUM, 1-2% COPPER, 0.1-.3% CARBON, NOT MORE THAN 2% OF MANGANESE, SILICON, SULPHUR, AND PHOSPHORUS TOGETHER (PERCENTAGES BEING BY WEIGHT), THE REMAINDER (APART FROM IMPURITIES AND TRACE ELEMENTS) BEING IRON, THE SINTERED SKELETON BEING INFILTRATED WITH COPPER OR COPPER-BASE ALLOY, AND THE ARTICLE BEING CASE-HARDENED.
Inventors
- 👤 E Farmer
- 👤 T Cadle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:57
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0242; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12167
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |