US2518906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable electrical resistance device
Assignee: Individual
•
Filing: 1948-10-15
•
Granted: 1950-08-15
•
Expires: 1968-10-15
Abstract
No abstract record available.
Inventors
- 👤 Donald O Kocmich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:28
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2453550A
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GB134865A
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US1447026A
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US1516526A
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US1614774A
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GB263634A
Cited
GB284770A
Cited
GB381689A
Cited
US2061863A
Cited
US2359085A
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US2391966A
Cited
US2481371A
Cited
US2453549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |