US2760188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proximity control device
Assignee: RADIO PATENTS Co
•
Filing: 1951-03-01
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Granted: 1956-08-21
•
Expires: 1971-03-01
Abstract
No abstract record available.
Inventors
- 👤 Guanella Gustav
- 👤 Guttinger Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:32
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; F; F42; F42C; F42C13/00; F42C13/04; H03F1/02; H03F1/04; H03F1/06; H03G; H03G3/00; H03G3/20; H03G3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2138138A
Cited
US2294171A
Cited
US2319965A
Cited
US2403567A
Cited
US2424263A
Cited
US2424905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |