US2670403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telephone
Assignee: Individual
•
Filing: 1952-01-25
•
Granted: 1954-02-23
•
Expires: 1972-01-25
Abstract
No abstract record available.
Inventors
- 👤 Victor C Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:30
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64; H04M1/65; H04M1/6515
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993612A
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US2005788A
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US2219030A
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US2261420A
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US2374842A
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US2342503A
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US2549548A
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US2539565A
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US2539139A
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US2597957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |