US3333080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of working a thin metal body by spark erosion
Assignee: US Philips Corp
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Filing: 1964-02-17
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Granted: 1967-07-25
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Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 Vries Gerhard Heinrich Frie De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:28
CPC Classifications
B; B23; B23H; B23H9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
AN IMPROVED METHOD OF WORKING A THIN METAL BODY BY SPARK EROSION COMPRISING THE STEPS OF PLACING A THIN METAL BODY AND ELECTRODE TOOL IN OPERATIVE RELATION TO ONE ANOTHER FOR SPARK EROSION WORKING, APPLYING A VOLTAGE POTENTIAL OF GIVEN POLARITY BETWEEN THE SAID BODY AND TOOL SO THAT SAID TOOL IS ERODED UNTIL THE ADJACENT SURFACES OF SAID TOOL AND THE OPPOSITE SURFACE OF SAID BODY ARE SUBSTANTIALLY PARALLEL, AND CHANGING THE POLARITY BETWEEN SAID TOOL AND BODY TO UNIFORMLY REDUCE THE THICKNESS OF SAID BODY OPPOSITE SAID TOOL.
Claim 2
Dependent Claim
90 words
AN IMPROVED METHOD OF WORKING A THIN METAL BODY BY SPARK EROSION COMPRISING THE STEPS OF PLACING A THIN METAL BODY AND ELECTRODE TOOL IN OPERATIVE RELATION TO ONE ANOTHER FOR SPARK EROSION WORKING, APPLYING A VOLTAGE POTENTIAL OF GIVEN POLARITY BETWEEN THE SAID BODY AND TOOL SO THAT SAID TOOL IS ERODED UNTIL THE ADJACENT SURFACES OF SAID TOOL AND THE OPPOSITE SURFACE OF SAID BODY ARE SUBSTANTIALLY PARALLEL, AND CHANGING THE POLARITY BETWEEN SAID TOOL AND BODY TO UNIFORMLY REDUCE THE THICKNESS OF SAID BODY OPPOSITE SAID TOOL.
References Cited (Backward Citations)
US3240914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |