US3128177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-cobalt infiltrant for iron powder
Assignee: New Jersey Zinc Co
•
Filing: 1960-12-27
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Granted: 1964-04-07
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 Elliott H Rennhack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:22
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0242; C22C9/00; C22C9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
AN INFILTRANT FOR IRON POWDER COMPACTS HAVING A MELTING POINT LOWER THAN THAT OF IRON AND CAPABLE, WHEN MELTED IN CONTACT WITH AN IRON POWDER COMPACT, OF INFILTRATING THE COMPACT WITHOUT PITTING THE SURFACE OF THE COMPACT AND WITHOUT LEAVING A RESIDUE ON THE SURFACE OF THE COMPACT, SAID INFILTRANT COMPRISING A COPPER-COBALT ALLOY CONSISTING ESSENTIALLY OF 1% TO 4.5% BY WEIGHT OF COBALT AND THE BALANCE COPPER.
Claim 2
Dependent Claim
68 words
AN INFILTRANT FOR IRON POWDER COMPACTS HAVING A MELTING POINT LOWER THAN THAT OF IRON AND CAPABLE, WHEN MELTED IN CONTACT WITH AN IRON POWDER COMPACT, OF INFILTRATING THE COMPACT WITHOUT PITTING THE SURFACE OF THE COMPACT AND WITHOUT LEAVING A RESIDUE ON THE SURFACE OF THE COMPACT, SAID INFILTRANT COMPRISING A COPPER-COBALT ALLOY CONSISTING ESSENTIALLY OF 1% TO 4.5% BY WEIGHT OF COBALT AND THE BALANCE COPPER.
References Cited (Backward Citations)
US2867528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |