US2944172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for working materials by means of a beam of charged particles
Assignee: Carl Zeiss AG
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Filing: 1959-08-26
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Granted: 1960-07-05
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Expires: 1979-08-26
Abstract
No abstract record available.
Inventors
- 👤 Opitz Wolfgang
- 👤 Spruck Helmut
- 👤 Steigerwald Karl Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:05
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/301; B; B23; B23K; B23K15/00; B23K15/0013; H01J37/02; H01J37/04; H01J37/09; H01J37/16; H01J37/165; H01J37/3002; H01J37/3005; H01J37/304; Y; Y10; Y10S; Y10S164/00; Y10S164/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |