Patent US2535509A successfully refreshed from Google Patents.
US2535509A
Expired / Lapsed
US
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Party identification in automatic telephony
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1946-11-22
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Granted: 1950-12-26
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Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 John E Ostline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:43
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/04; H04Q; H04Q3/00; H04Q3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1412458A
Cited
US1525787A
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US1595072A
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US2023239A
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US2105001A
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US2137518A
Cited
US2422565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |