Patent US2588935A successfully refreshed from Google Patents.
US2588935A
Expired / Lapsed
US
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Telephone call counting device
Assignee: Individual
•
Filing: 1949-08-06
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Granted: 1952-03-11
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Expires: 1969-08-06
Abstract
No abstract record available.
Inventors
- 👤 Oran Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:54
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/28; H04M15/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US541373A
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US543816A
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US578906A
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US1348575A
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US1418384A
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US1826520A
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US1705018A
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US1657828A
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US1711222A
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US1956152A
Cited
US2110668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |