Patent US4271413A successfully refreshed from Google Patents.
US2989614A
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Method and device for working materials by means of a beam of charged particles
Assignee: Carl Zeiss AG
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Filing: 1958-11-18
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Granted: 1961-06-20
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Expires: 1978-11-18
Abstract
No abstract record available.
Inventors
- 👤 Steigerwald Karl Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:43
CPC Classifications
B; B23; B23K; B23K15/00; B23K15/02; H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/147; H01J37/1472; H01J37/30; H01J37/302; H01J37/3023; H01J37/304; Y; Y10; Y10S; Y10S164/00; Y10S164/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2778926A
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US2850723A
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US2819380A
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US2872669A
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US2931022A
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US2883544A
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FR1141535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |