Patent US3290124A successfully refreshed from Google Patents.
US3290124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous electrical discharge machine electrodes
Assignee: Rametco Inc
•
Filing: 1964-10-29
•
Granted: 1966-12-06
•
Expires: 1984-10-29
Abstract
No abstract record available.
Inventors
- 👤 Jr John Sam Holtzclaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:34
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/114; B23; B23H; B23H1/00; B23H1/04; B23H1/06; B22F2999/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153; Y10T428/1216; Y10T428/12174
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
AN ELECTRICAL DISCHARGE MACHINE ELECTRODE HAVING A PROUS STRUCTURE TO PERMIT THE FLOW THERETHROUGH OF A DIELECTRIC CLEANING FLUID, COMPRISING A POROUS SINTERED BODY OF REFRACTORY METAL SELECTED FROM THE CLASS CONSISTING OF TUNGSTEN, MOLYBDENUM, TANTALUM AND COLUMBIUM, THE PORES OS SAID BODY BEING LINED WITH AN INTERMETALLIC ALLOY, ONE COMPONENT OF SAID ALLOY BEING PARTIALLY REMOVED TO OPEN SAID PORES TO PERMIT FLOW THERETHROUGH OF SAID FLUID.
Claim 2
Dependent Claim
68 words
AN ELECTRICAL DISCHARGE MACHINE ELECTRODE HAVING A PROUS STRUCTURE TO PERMIT THE FLOW THERETHROUGH OF A DIELECTRIC CLEANING FLUID, COMPRISING A POROUS SINTERED BODY OF REFRACTORY METAL SELECTED FROM THE CLASS CONSISTING OF TUNGSTEN, MOLYBDENUM, TANTALUM AND COLUMBIUM, THE PORES OS SAID BODY BEING LINED WITH AN INTERMETALLIC ALLOY, ONE COMPONENT OF SAID ALLOY BEING PARTIALLY REMOVED TO OPEN SAID PORES TO PERMIT FLOW THERETHROUGH OF SAID FLUID.
Claim 3
Independent Claim
67 words
THE METHOD OF FABRICATING AN ELECTRICAL DISCHARGE MACHINE ELECTRODE, COMPRISING THE STEPS OF COMPACTING PARTICLES OF A REFRACTORY METAL TO FORM A GREEN COMPACT, SINTERING SAID GREEN COMPACT TO FORM A POROUS SKELETON, IMPREGNATING SAID SKELETON WITH A MOLTON INTERMETALLIC ALLOY TO FILL ALL PORES THEREIN, AND PARTIALLY REMOVING ONE COMPONENT OF SAID ALLOY TO REOPEN SAID PORES WHEREBY SAID PORES ARE LINED WITH SAID INTERMETALLIC ALLOY.
Claim 4
Independent Claim
67 words
THE METHOD OF FABRICATING AN ELECTRICAL DISCHARGE MACHINE ELECTRODE, COMPRISING THE STEPS OF COMPACTING PARTICLES OF A REFRACTORY METAL TO FORM A GREEN COMPACT, SINTERING SAID GREEN COMPACT TO FORM A POROUS SKELETON, IMPREGNATING SAID SKELETON WITH A MOLTON INTERMETALLIC ALLOY TO FILL ALL PORES THEREIN, AND PARTIALLY REMOVING ONE COMPONENT OF SAID ALLOY TO REOPEN SAID PORES WHEREBY SAID PORES ARE LINED WITH SAID INTERMETALLIC ALLOY.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |