US3445600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone answering device
Assignee: Individual
•
Filing: 1964-08-07
•
Granted: 1969-05-20
•
Expires: 1984-08-07
Abstract
No abstract record available.
Inventors
- 👤 Leonard M Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:36
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)
US3344234A
Cited
US2937237A
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US2935566A
Cited
US3127474A
Cited
US3133992A
Cited
US3226478A
Cited
US3310629A
Cited
US3337690A
Cited
US3293365A
Cited
US3248482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |