US2778742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating a porous ferrous part with copper
Assignee: Motors Liquidation Co
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Filing: 1953-05-25
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Granted: 1957-01-22
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Expires: 1973-05-25
Abstract
No abstract record available.
Inventors
- 👤 Paul J Shipe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:07
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A METHOD FOR IMPREGNATING A POROUS FERROUS PART WITH A CUPREOUS METAL WHEREIN THE FERROUS PART, AFTER IMPREGNATION, IS SUBSTANTIALLY FREE FROM PITS, CHANNELS AND THE LIKE, THE STEPS COMPRISNING; MIXING A DESIRED QUANTITY OF CUPREOUS METAL WITH FROM 1 TO 5% BY WEIGHT THEREOF OF CAST IRON POWDER, PLACING SAID MIXTURE UPON SAID FERROUS PART TO BE IMPREGNATED IN A DESIRED POSITION RELATIVE THERTO, HEATING THE FERROUS PART WITH THE MIXTURE OF CUPREOUS METAL AND CAST IRON POWDER THEREON TO A TEMPERATURE ABOVE THE MELTING POINT OF THE CUPREOUS METAL AND BELOW THE MELTING POINT OF IRON FOR A TIME SUFFICIENT TO OBTAIN EQUILIBRIUM TEMPERATURE CONDITIONS IN SAID MIXTURE AND SAID PART WHEREUPON SAID CUPREOUS METLA DISSOLVES A DESIRED PORTION OF THE IRON IN THE CAST IRON AND THEN INFILTRATES SAID FERROUS PART, AND FINALLY REMOVING ANY RESIDUE OF SAID MIXTURE FROM SAID INFILTRATED PART.
Claim 2
Dependent Claim
147 words
IN A METHOD FOR IMPREGNATING A POROUS FERROUS PART WITH A CUPREOUS METAL WHEREIN THE FERROUS PART, AFTER IMPREGNATION, IS SUBSTANTIALLY FREE FROM PITS, CHANNELS AND THE LIKE, THE STEPS COMPRISNING; MIXING A DESIRED QUANTITY OF CUPREOUS METAL WITH FROM 1 TO 5% BY WEIGHT THEREOF OF CAST IRON POWDER, PLACING SAID MIXTURE UPON SAID FERROUS PART TO BE IMPREGNATED IN A DESIRED POSITION RELATIVE THERTO, HEATING THE FERROUS PART WITH THE MIXTURE OF CUPREOUS METAL AND CAST IRON POWDER THEREON TO A TEMPERATURE ABOVE THE MELTING POINT OF THE CUPREOUS METAL AND BELOW THE MELTING POINT OF IRON FOR A TIME SUFFICIENT TO OBTAIN EQUILIBRIUM TEMPERATURE CONDITIONS IN SAID MIXTURE AND SAID PART WHEREUPON SAID CUPREOUS METLA DISSOLVES A DESIRED PORTION OF THE IRON IN THE CAST IRON AND THEN INFILTRATES SAID FERROUS PART, AND FINALLY REMOVING ANY RESIDUE OF SAID MIXTURE FROM SAID INFILTRATED PART.
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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |