US3524936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telephone answering device having remote control and conference call capability
Assignee: World Wide Electronics Inc
•
Filing: 1964-11-10
•
Granted: 1970-08-18
•
Expires: 1984-11-10
Abstract
No abstract record available.
Inventors
- 👤 James J Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:14
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64; H04M1/65; H04M1/652
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2539515A
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US2558669A
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US2539139A
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US2784254A
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US3060408A
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US3050585A
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US3136856A
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US3127474A
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US3189690A
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US3310629A
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US3337690A
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US3293365A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |