Patent US2436402A successfully refreshed from Google Patents.
US2436402A
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Method of laying communication lines
Assignee: AT&T Inc
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Filing: 1944-09-08
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Granted: 1948-02-24
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Expires: 1964-09-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:12
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE270555C
Cited
US906547A
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US1778284A
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US1842164A
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US2161044A
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US2223110A
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US2320798A
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US2336051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |