US2494255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop antenna
Assignee: Edwin I Guthman & Co Inc
•
Filing: 1945-12-20
•
Granted: 1950-01-10
•
Expires: 1965-12-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Morris
- 👤 Frank A Iverson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:05
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1601817A
Cited
US1553315A
Cited
DE529892C
Cited
US2018477A
Cited
US2030160A
Cited
US2197616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |