Patent US2444445A successfully refreshed from Google Patents.
US2355191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply for electron microscopes
Assignee: RCA Corp
•
Filing: 1942-04-28
•
Granted: 1944-08-08
•
Expires: 1962-04-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Vance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/52; H; H01; H01J; H01J37/00; H01J37/02; H01J37/24; H02; H02M; H02M1/00; H02M1/10; H03; H03F; H03F1/00; H03F1/52; H03F1/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1947-08-08 | 1948-02-07 | 1948-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-08 | 1952-02-07 | 1952-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-08 | 1956-02-07 | 1956-08-08 | $7700.00 | Window Closed / Lapsed |