US2632785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pocket type voltage and polarity detector and indicator
Assignee: Individual
•
Filing: 1945-04-09
•
Granted: 1953-03-24
•
Expires: 1965-04-09
Abstract
No abstract record available.
Inventors
- 👤 Harold P Knopp
- 👤 Louise B Knopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:07
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US408018A
Cited
US420422A
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US1193095A
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GB189906443A
Cited
US747871A
Cited
FR367982A
Cited
US2103179A
Cited
US2075860A
Cited
US2290760A
Cited
US2366991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |