US2482081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic pickup
Assignee: Individual
•
Filing: 1944-12-19
•
Granted: 1949-09-13
•
Expires: 1964-12-19
Abstract
No abstract record available.
Inventors
- 👤 William H Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:54
CPC Classifications
H; H04; H04R; H04R19/00; H04R19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB310762A
Cited
US1786436A
Cited
US1796155A
Cited
US2147092A
Cited
US2319622A
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US2436946A
Cited
US2373676A
Cited
US2376456A
Cited
US2371373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |