Patent US2479752A successfully refreshed from Google Patents.
US2479752A
Expired / Lapsed
US
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Memo attachment for table telephones
Assignee: Individual
•
Filing: 1945-01-31
•
Granted: 1949-08-23
•
Expires: 1965-01-31
Abstract
No abstract record available.
Inventors
- 👤 Lohr Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:12
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1425559A
Cited
US1767003A
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US1878601A
Cited
US2061449A
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US2148055A
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US2266870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-22 | 1953-02-21 | 1953-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-22 | 1957-02-21 | 1957-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-22 | 1961-02-21 | 1961-08-23 | $7700.00 | Window Closed / Lapsed |