US2376272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telephone answering system
Assignee: AT&T Inc
•
Filing: 1943-11-02
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Granted: 1945-05-15
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Expires: 1963-11-02
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Peterson
- 👤 George W Papenmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:51
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-05-14 | 1948-11-13 | 1949-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-05-14 | 1952-11-13 | 1953-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-05-14 | 1956-11-13 | 1957-05-15 | $7700.00 | Window Closed / Lapsed |