US2456653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for high-frequency transmission lines
Assignee: Unisys Corp
•
Filing: 1942-12-10
•
Granted: 1948-12-21
•
Expires: 1962-12-10
Abstract
No abstract record available.
Inventors
- 👤 Donald L Snow
- 👤 William W Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:20
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/477
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US789515A
Cited
US1498908A
Cited
US1456110A
Cited
US1547395A
Cited
US1639575A
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US1679513A
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GB249084A
Cited
US1740443A
Cited
US1893286A
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US2062335A
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US2057452A
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US2121598A
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US2119608A
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US2172978A
Cited
US2169570A
Cited
US2133492A
Cited
US2273135A
Cited
US2163410A
Cited
US2273488A
Cited
US2394398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |