US3426152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone answering device
Assignee: Donnell James E O
•
Filing: 1964-05-20
•
Granted: 1969-02-04
•
Expires: 1984-05-20
Abstract
No abstract record available.
Inventors
- 👤 Timothy J O'halloran
- 👤 James E O'donnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:46
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)
US2549548A
Cited
US2848541A
Cited
US2928898A
Cited
US3127474A
Cited
US3337690A
Cited
US3248482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |