US2522542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy current resistor
Assignee: Individual
•
Filing: 1948-07-02
•
Granted: 1950-09-19
•
Expires: 1968-07-02
Abstract
No abstract record available.
Inventors
- 👤 Schaefer Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:56
CPC Classifications
H; H01; H01C; H01C3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US658601A
Cited
US1021256A
Cited
US1991935A
Cited
US2165970A
Cited
US2111506A
Cited
US2287915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |