US2200233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge responsive device
Assignee: Individual
•
Filing: 1939-01-04
•
Granted: 1940-05-07
•
Expires: 1959-01-04
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Whitehead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:21
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/04; G01R13/12; H; H01; H01T; H01T1/00; H01T1/02; H01T1/08; H01T1/10
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) | 1943-05-07 | 1943-11-06 | 1944-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-07 | 1947-11-06 | 1948-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-07 | 1951-11-06 | 1952-05-07 | $7700.00 | Window Closed / Lapsed |