US2696528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accessory for use with telephones
Assignee: Individual
•
Filing: 1949-05-25
•
Granted: 1954-12-07
•
Expires: 1969-05-25
Abstract
No abstract record available.
Inventors
- 👤 Sanford C Chesick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US806372A
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US858836A
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US960723A
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DE409196C
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US1847649A
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US2243554A
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US2310032A
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US2525699A
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US2595054A
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US2602863A
Cited
US2552906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |