Patent US2951121A successfully refreshed from Google Patents.
US2951121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed telegraph system
Assignee: Individual
•
Filing: 1954-04-26
•
Granted: 1960-08-30
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Conrad Ivan Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
H; H04; H04L; H04L21/00; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1725533A
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US2178410A
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US2248522A
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US2291476A
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US2486985A
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US2510072A
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US2686222A
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US2762862A
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US2829025A
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US2736770A
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US2735956A
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US2777745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |