Patent US2452737A successfully refreshed from Google Patents.
US2452737A
Expired / Lapsed
US
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Resistor
Assignee: Individual
•
Filing: 1944-03-21
•
Granted: 1948-11-02
•
Expires: 1964-03-21
Abstract
No abstract record available.
Inventors
- 👤 Albert S Eisenstein
- 👤 Kenneth J Germeshausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:59
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/001; H01C1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US464055A
Cited
US1086726A
Cited
US1365481A
Cited
US1935313A
Cited
US1905353A
Cited
US2081894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |