US2624022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for regulating the focal length of magnetostatic pole shoe lenses
Assignee: Siemens and Halske AG
•
Filing: 1951-11-30
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Granted: 1952-12-30
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Expires: 1971-11-30
Abstract
No abstract record available.
Inventors
- 👤 Wolff Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:31
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/10; H01J37/14; H01J37/143; D; D05; D05B; D05B57/00; D05B57/08; D05B57/10; D05B57/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2163157A
Cited
US2305761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |