Patent US4220846A successfully refreshed from Google Patents.
Patent US3219569A successfully refreshed from Google Patents.
US3219569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic metal removal apparatus
Assignee: Rolls Royce PLC
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Filing: 1961-06-02
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Granted: 1965-11-23
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Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Wilkinson Bernard Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:18
CPC Classifications
B; B23; B23H; B23H3/00; B23H3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
AN ELECTROLYTIC MAACHINING APPARATUS, INCLUDING A SHAPING ELECTRODE COMPRISING A SOLID METAL BODY HAVING AN EXTERNAL FORMING SURFACE WHICH IS COMPLEMENTARY IN SHAPE TO A PREDETERMINED SHAPE IT IS DESIRED TO PRODUCE ON A WORKPIECE, AND A HOLLOW ELECTROLYTE CHUTE PROVIDING A PASSAGE THERETHROUG FOR A FLOW OF ELECTROLYTE, SAID CHUTE BEING FINALLY ATTACHED AS ITS DOWNSTREAM END TO THE BODY AND MOVABLE AS A UNIT THEREWITH WITH THE DOWNSTREAM END OF SAID CHUTE INCLINED TOWARDS THE BODY, AND PROVIDING AN ELECTROLYTE DISCHARGE SLIT IMMEDIATELY ADJACENT SAID BODY, WHICH SLIT BORDERS AND FACES ACROSS SAID FORMING SURFACE SO THAT ELECTROLYTE FLOWING THROUGH THE CHUTE DISCHARGES FROM SAID SLIT IN A STREAM ACROSS SAID FORMING SURFACE, THE STREAM AT LEAST INITIALLY FLOWING TANGENTIALLY IN CONTACT WITH SAID FORMING SURFACE, AND MEANS FOR SUPPORTING A WORKPIECE IN JUXTAPOSITION TO SAID FORMING SURFACE.
Claim 2
Dependent Claim
140 words
AN ELECTROLYTIC MAACHINING APPARATUS, INCLUDING A SHAPING ELECTRODE COMPRISING A SOLID METAL BODY HAVING AN EXTERNAL FORMING SURFACE WHICH IS COMPLEMENTARY IN SHAPE TO A PREDETERMINED SHAPE IT IS DESIRED TO PRODUCE ON A WORKPIECE, AND A HOLLOW ELECTROLYTE CHUTE PROVIDING A PASSAGE THERETHROUG FOR A FLOW OF ELECTROLYTE, SAID CHUTE BEING FINALLY ATTACHED AS ITS DOWNSTREAM END TO THE BODY AND MOVABLE AS A UNIT THEREWITH WITH THE DOWNSTREAM END OF SAID CHUTE INCLINED TOWARDS THE BODY, AND PROVIDING AN ELECTROLYTE DISCHARGE SLIT IMMEDIATELY ADJACENT SAID BODY, WHICH SLIT BORDERS AND FACES ACROSS SAID FORMING SURFACE SO THAT ELECTROLYTE FLOWING THROUGH THE CHUTE DISCHARGES FROM SAID SLIT IN A STREAM ACROSS SAID FORMING SURFACE, THE STREAM AT LEAST INITIALLY FLOWING TANGENTIALLY IN CONTACT WITH SAID FORMING SURFACE, AND MEANS FOR SUPPORTING A WORKPIECE IN JUXTAPOSITION TO SAID FORMING SURFACE.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |