US3244852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making electric discharge machining electrode
Assignee: Avco Corp
•
Filing: 1964-01-06
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Granted: 1966-04-05
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 George M Herterick
- 👤 Peterson John David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:57
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR MAKING AN ELECTRICAL DISCHARGE MACHINING ELECTRODE COMPRISING THE STEPS OF: (A) PROVIDING A COPPER MANDRIL INCLUDING A FIRST SURFACE HAVING A DESIRED SHAPE; (B) SPRAY COATING SAID FIRST SURFACE WITH A TUNGSTEN FOR FORMING A POROUS TUNGSTEN SKELETON HAVING AN EXTERIOR SURFACE SIMILAR IN SHAPE TO SAID FIRST SURFACE; AND
Claim 2
Dependent Claim
53 words
A PROCESS FOR MAKING AN ELECTRICAL DISCHARGE MACHINING ELECTRODE COMPRISING THE STEPS OF: (A) PROVIDING A COPPER MANDRIL INCLUDING A FIRST SURFACE HAVING A DESIRED SHAPE; (B) SPRAY COATING SAID FIRST SURFACE WITH A TUNGSTEN FOR FORMING A POROUS TUNGSTEN SKELETON HAVING AN EXTERIOR SURFACE SIMILAR IN SHAPE TO SAID FIRST SURFACE; AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |