US2676427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dial attachment for telephones
Assignee: Individual
•
Filing: 1947-02-19
•
Granted: 1954-04-27
•
Expires: 1967-02-19
Abstract
No abstract record available.
Inventors
- 👤 Beatrice Van R Martindale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:06
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1466286A
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US1546557A
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US1535490A
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US1820184A
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US1825204A
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US1860606A
Cited
GB458713A
Cited
US2068271A
Cited
US2231103A
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US2198935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |