US2854512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Close coupled telephone answering and message recording device
Assignee: ELECTRONIC SECRETARY IND Inc
•
Filing: 1951-04-30
•
Granted: 1958-09-30
•
Expires: 1971-04-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:04
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)
US1454157A
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US2005788A
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US2100434A
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US2328562A
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US2384604A
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US2549548A
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US2539139A
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US2673242A
Cited
US2724015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |