US2422943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron microscope
Assignee: General Electric Co
•
Filing: 1944-02-01
•
Granted: 1947-06-24
•
Expires: 1964-02-01
Abstract
No abstract record available.
Inventors
- 👤 Charles H Bachman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:06
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/22; H01J37/224; H01J29/00; H01J29/02; H01J29/10; H01J29/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB445978A
Cited
US2163918A
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US2171970A
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US2156813A
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US2330171A
Cited
US2355110A
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US2330172A
Cited
US2351889A
Cited
US2356633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |