Patent US5246370A successfully refreshed from Google Patents.
US3210263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge apparatus for etching
Assignee: Nuclear Materials and Equipment Corp
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Filing: 1962-01-11
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Granted: 1965-10-05
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Expires: 1982-01-11
Abstract
No abstract record available.
Inventors
- 👤 Jones Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:21
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A CATHODIC VACUUM ETCHER FOR ETCHING A SPECIMEN INCLUDING A CHAMBER HAVING AN ANODE ELECTRODE FOR SAID ETCHER, MEANS CONNECTED TO SAID CHAMBER FOR EVACUATING SAID CHAMBER, AND A READILY MANIPULATED CATHODE ASSEMBLY FOR MOUNTING SAID SPECIMEN A IN A POSITION TO BE ETCHED BY A DISCHARGE IN SAID CHAMBER, SAID ASSEMBLY INCLUDING A BLOCK OF THERMALLY AND ELECTRICALLY CONDUCTING MATERIAL HAVING A CAVITY THEREIN, MEANS FOR CONNECTING SAID BLOCK THERMALLY AND ELECTRICALLY TO SAID SPECIMEN, MEANS FOR MOUNTING SAID BLOCK SO THAT SAID BLOCK SUPPORTS SAID SPECIMEN IN SAID CHAMBER, SAID MOUNTING MEANS INCLUDING A SUBSTANTIALLY VACUUM TIGHT JOINT PERMITTING MOVEMENT OF SAID BLOCK, INLET AND OUTLET CONDUCTORS FOR
Claim 2
Dependent Claim
110 words
A CATHODIC VACUUM ETCHER FOR ETCHING A SPECIMEN INCLUDING A CHAMBER HAVING AN ANODE ELECTRODE FOR SAID ETCHER, MEANS CONNECTED TO SAID CHAMBER FOR EVACUATING SAID CHAMBER, AND A READILY MANIPULATED CATHODE ASSEMBLY FOR MOUNTING SAID SPECIMEN A IN A POSITION TO BE ETCHED BY A DISCHARGE IN SAID CHAMBER, SAID ASSEMBLY INCLUDING A BLOCK OF THERMALLY AND ELECTRICALLY CONDUCTING MATERIAL HAVING A CAVITY THEREIN, MEANS FOR CONNECTING SAID BLOCK THERMALLY AND ELECTRICALLY TO SAID SPECIMEN, MEANS FOR MOUNTING SAID BLOCK SO THAT SAID BLOCK SUPPORTS SAID SPECIMEN IN SAID CHAMBER, SAID MOUNTING MEANS INCLUDING A SUBSTANTIALLY VACUUM TIGHT JOINT PERMITTING MOVEMENT OF SAID BLOCK, INLET AND OUTLET CONDUCTORS FOR
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |