Patent US2444429A successfully refreshed from Google Patents.
US2444429A
Expired / Lapsed
US
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Pulse type telegraph transmitter and receiver
Assignee: Individual
•
Filing: 1940-05-15
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Granted: 1948-07-06
•
Expires: 1960-05-15
Abstract
No abstract record available.
Inventors
- 👤 Claud E Cleeton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/493
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1790722A
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US913363A
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US1724057A
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US1936153A
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US2023436A
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US2089441A
Cited
US2061734A
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US2179690A
Cited
FR833929A
Cited
FR49159E
Cited
US2266401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |