Patent US2800530A successfully refreshed from Google Patents.
US2800530A
Expired / Lapsed
US
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Telephone answering and recording devices
Assignee: TELEPHONE ANSWERING AND RECORD
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Filing: 1952-01-09
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Granted: 1957-07-23
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Expires: 1972-01-09
Abstract
No abstract record available.
Inventors
- 👤 Harry R Van Deventer
- 👤 John J Shively
- 👤 Paul C Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:17
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64; H04M1/65; G; G11; G11B; G11B25/00; G11B25/04; G11B25/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1845034A
Cited
US2080812A
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US2284173A
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US2221883A
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US2374842A
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US2558040A
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US2528459A
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US2503176A
Cited
US2519568A
Cited
US2529636A
Cited
US2658107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |