US2498669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impulse transmitter test instrument
Assignee: Federal Telephone and Radio Corp
•
Filing: 1944-09-29
•
Granted: 1950-02-28
•
Expires: 1964-09-29
Abstract
No abstract record available.
Inventors
- 👤 Owen C From
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:16
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1543813A
Cited
US1693725A
Cited
US1621480A
Cited
US2207513A
Cited
US2248923A
Cited
US2245683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |