Patent US2450459A successfully refreshed from Google Patents.
US2450459A
Expired / Lapsed
US
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Electrode system
Assignee: PHOTOSWITCH Inc
•
Filing: 1944-01-13
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Granted: 1948-10-05
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Expires: 1964-01-13
Abstract
No abstract record available.
Inventors
- 👤 Thomson Elihu Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:31
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07; G01N27/22; G01N27/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1138761A
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US1450023A
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US1524937A
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US2122363A
Cited
US2130073A
Cited
US2311977A
Cited
US2330394A
Cited
US2370609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |