US2643301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand telephone
Assignee: Individual
•
Filing: 1949-04-11
•
Granted: 1953-06-23
•
Expires: 1969-04-11
Abstract
No abstract record available.
Inventors
- 👤 Nathan J Cornfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:44
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/21; H04M1/215; H04M1/2155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US546972A
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US854439A
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US839050A
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US1298771A
Cited
US1340955A
Cited
US1648832A
Cited
US1558191A
Cited
US2121941A
Cited
US2160829A
Cited
US2544027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |