Patent US3303559A successfully refreshed from Google Patents.
US3303559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge machine electrodes
Assignee: Rametco Inc
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Filing: 1965-05-12
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Granted: 1967-02-14
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Expires: 1985-05-12
Abstract
No abstract record available.
Inventors
- 👤 Holtzclaw John Sam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF FABRICATING AN EDM ELECTRODE, COMPRISING THE STEPS OF COMPACTING PARTICULATES OF A REFRACTORY METAL SELECTED FROM THE CLASS CONSISTING OF TUNGSTEN, MOLYBDENUM, TANTALUM AND COLUMBIUM, SINTERING SAID COMPACT TO PRODUCE A POROUS BLANK, IMPREGNATING THE POROUS BLANK WITH A REDUCING AGENT TO REDUCE OXIDES ON THE SURFACE THEREOF, IMPREGNATING THE PORES OF SAID BLANK WITH A MOLTEN INTERMETALLIC ALLOY HAVING A RELATIVELY HIGH ELECTRICAL CONDUCTIVITY AND A LOWER MELTING POINT THAN THE SINTERING TEMPERATURE OF SAID REFRACTORY METAL, SAID ALLOY HAVING A WETTING AGENT ADDED THERETO TO INCREASE THE
Claim 2
Independent Claim
92 words
THE METHOD OF FABRICATING AN EDM ELECTRODE, COMPRISING THE STEPS OF COMPACTING PARTICULATES OF A REFRACTORY METAL SELECTED FROM THE CLASS CONSISTING OF TUNGSTEN, MOLYBDENUM, TANTALUM AND COLUMBIUM, SINTERING SAID COMPACT TO PRODUCE A POROUS BLANK, IMPREGNATING THE POROUS BLANK WITH A REDUCING AGENT TO REDUCE OXIDES ON THE SURFACE THEREOF, IMPREGNATING THE PORES OF SAID BLANK WITH A MOLTEN INTERMETALLIC ALLOY HAVING A RELATIVELY HIGH ELECTRICAL CONDUCTIVITY AND A LOWER MELTING POINT THAN THE SINTERING TEMPERATURE OF SAID REFRACTORY METAL, SAID ALLOY HAVING A WETTING AGENT ADDED THERETO TO INCREASE THE
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |