Patent US3208923A successfully refreshed from Google Patents.
US3208923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electrolytic etching
Assignee: —
•
Filing: —
•
Granted: 1965-09-28
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Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:09
CPC Classifications
B; B23; B23H; B23H9/00; C; C25; C25F; C25F7/00; B23H3/00; B23H5/00; B23H5/06; B23H5/08; C25F3/00; C25F3/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A METHOD FOR ELECTROCHEMICALLY ETCHING A SURFACE OF A WORKPIECE COMPRISING THE STEPS OF CONTACTING AT FIRST SIDE OF AN APETURED WORKPIECE IN ABUTTING RELATION WITH A SELECTIVELY CONTOURED SURFACE OF A FORMING MEMBER, DISCHARGING AN ETCHING CONSTITUENT ONTO A SECOND SIDE AND THROUGH SAID APETURED WORKPIECE AND ELECTROCHEMICALLY ETCHING THE FIRST SIDE OF SAID WORKPIECE IN CONFORMANCE WITH THE CONTOURED SURFACE OF SAID FORMING MEMBER.
Claim 2
Independent Claim
66 words
A METHOD FOR ELECTROCHEMICALLY ETCHING A SURFACE OF A WORKPIECE COMPRISING THE STEPS OF CONTACTING AT FIRST SIDE OF AN APETURED WORKPIECE IN ABUTTING RELATION WITH A SELECTIVELY CONTOURED SURFACE OF A FORMING MEMBER, DISCHARGING AN ETCHING CONSTITUENT ONTO A SECOND SIDE AND THROUGH SAID APETURED WORKPIECE AND ELECTROCHEMICALLY ETCHING THE FIRST SIDE OF SAID WORKPIECE IN CONFORMANCE WITH THE CONTOURED SURFACE OF SAID FORMING MEMBER.
Claim 3
Dependent Claim
93 words
IN A APPARATUS FOR SHAPING A PERVIOUS WORKPIECE COMPRISING: A POROUS MOLD MEMBER HAVING A CONTOURED SURFACE CONFORMING TO A DESIRED SHAPE OF THW ORKPIECE; MEANS FOR CONTACTING THE WORKPIECE AGAINST SAID CONTOURED SURFACE OF SAID MOLD MEMBER TO FORM AN ASSEMBLY OF WORKPIECE AND MOLD MEMBER; AND MEANS FOR PASSING AN ELECTRIC CURRENT BETWEEN SAID CONTOURED SURFACE AND SAID WORKPIECE SO THAT SELECTED AREAS ON SAID WORKPIECE ARE ETCHED; THE IMPROVEMENT COMPRISING; MEANS ON ONE SIDE OF THE ASSEMBLY FOR CONTINUOUSLY FLOWING AN ELECTROLYTE THROUGH SAID ASSEMBLY AND OVER SAID CONTOURED SURFACE.
Claim 4
Dependent Claim
93 words
IN A APPARATUS FOR SHAPING A PERVIOUS WORKPIECE COMPRISING: A POROUS MOLD MEMBER HAVING A CONTOURED SURFACE CONFORMING TO A DESIRED SHAPE OF THW ORKPIECE; MEANS FOR CONTACTING THE WORKPIECE AGAINST SAID CONTOURED SURFACE OF SAID MOLD MEMBER TO FORM AN ASSEMBLY OF WORKPIECE AND MOLD MEMBER; AND MEANS FOR PASSING AN ELECTRIC CURRENT BETWEEN SAID CONTOURED SURFACE AND SAID WORKPIECE SO THAT SELECTED AREAS ON SAID WORKPIECE ARE ETCHED; THE IMPROVEMENT COMPRISING; MEANS ON ONE SIDE OF THE ASSEMBLY FOR CONTINUOUSLY FLOWING AN ELECTROLYTE THROUGH SAID ASSEMBLY AND OVER SAID CONTOURED 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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |