Patent US4262734A successfully refreshed from Google Patents.
US2673241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone answering and recording device
Assignee: TELEPHONE ANSWERING AND RECORD
•
Filing: 1948-06-02
•
Granted: 1954-03-23
•
Expires: 1968-06-02
Abstract
No abstract record available.
Inventors
- 👤 Harry R Van Deventer
- 👤 Paul C Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:53
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64; H04M1/65
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1955497A
Cited
US1845034A
Cited
US1939072A
Cited
US1973081A
Cited
US2080812A
Cited
US2284173A
Cited
US2093675A
Cited
US2221883A
Cited
US2165546A
Cited
US2250242A
Cited
US2261420A
Cited
US2283591A
Cited
US2300950A
Cited
US2374842A
Cited
US2278828A
Cited
US2313852A
Cited
US2340160A
Cited
US2321053A
Cited
US2322359A
Cited
US2376272A
Cited
US2393272A
Cited
US2380799A
Cited
US2396385A
Cited
US2417129A
Cited
US2558040A
Cited
US2528459A
Cited
US2531203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |