Patent US2768099A successfully refreshed from Google Patents.
US2768099A
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Method of making powdered compacts
Assignee: Gibson Electric Co
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Filing: 1952-10-16
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Granted: 1956-10-23
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Expires: 1972-10-16
Abstract
No abstract record available.
Inventors
- 👤 Norman S Hoyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:17
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN A PROCESS WHEREIN A POROUS ARTICLE MADE BY SINTERING A COMPACT OF POWDERED REFRACTORY MATERIAL IS, AFTER SINTERING, IMPREGNATED WITH A MOLTEN METAL MATERIAL HAVING A MELTING POINT LOWER THAN THAT OF THE REFRACTORY MATERIAL, THE IMPROVEMENT WHICH COMPRISES APPLYING TO A PORTION ONLY OF THE SURFACE OF THE SINTERED COMPACT BEFORE IMPREGNATION A COATING OF FINELY DIVIDED CARBON SELECTED FROM THE GROUP CONSISTING OF CARBON BLACK AND GRAPHITE.
Claim 2
Dependent Claim
70 words
IN A PROCESS WHEREIN A POROUS ARTICLE MADE BY SINTERING A COMPACT OF POWDERED REFRACTORY MATERIAL IS, AFTER SINTERING, IMPREGNATED WITH A MOLTEN METAL MATERIAL HAVING A MELTING POINT LOWER THAN THAT OF THE REFRACTORY MATERIAL, THE IMPROVEMENT WHICH COMPRISES APPLYING TO A PORTION ONLY OF THE SURFACE OF THE SINTERED COMPACT BEFORE IMPREGNATION A COATING OF FINELY DIVIDED CARBON SELECTED FROM THE GROUP CONSISTING OF CARBON BLACK AND GRAPHITE.
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |