US2253542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron scanning microscope
Assignee: Individual
•
Filing: 1939-05-31
•
Granted: 1941-08-26
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Expires: 1959-05-31
Abstract
No abstract record available.
Inventors
- 👤 Ardenne Manfred Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:27
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/21; B; B62; B62D; B62D1/00; B62D1/24; B62D1/26; H01J37/22; H01J37/26; H01J37/28; H01J2237/00; H01J2237/245; H01J2237/24507; H01J2237/24514; H01J2237/24542
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) | 1944-08-25 | 1945-02-24 | 1945-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-25 | 1949-02-24 | 1949-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-25 | 1953-02-24 | 1953-08-26 | $7700.00 | Window Closed / Lapsed |