Patent US2203347A successfully refreshed from Google Patents.
US2203347A
Expired / Lapsed
US
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Electro-optical method and apparatus
Assignee: Individual
•
Filing: 1935-02-15
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Granted: 1940-06-04
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Expires: 1955-02-15
Abstract
No abstract record available.
Inventors
- 👤 John C Batchelor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:32
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/30; G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/023; H04; H04N; H04N23/00; H04N23/10; H04N23/12
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) | 1943-06-04 | 1943-12-04 | 1944-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-04 | 1947-12-04 | 1948-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-04 | 1951-12-04 | 1952-06-04 | $7700.00 | Window Closed / Lapsed |