US2970258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring envelope delay
Assignee: General Radio Co
•
Filing: 1955-08-29
•
Granted: 1961-01-31
•
Expires: 1975-08-29
Abstract
No abstract record available.
Inventors
- 👤 Donald B Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:06
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/46; H04B3/462
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2047782A
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DE701423C
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US2285038A
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US2416310A
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US2685062A
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US2625614A
Cited
US2752565A
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US2808562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |