US2602858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide dielectric protection
Assignee: AT&T Inc
•
Filing: 1946-04-06
•
Granted: 1952-07-08
•
Expires: 1966-04-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph V L Hartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:55
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/08; H01P1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1886153A
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CH167618A
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US2034032A
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US1991230A
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US2118667A
Cited
US2147717A
Cited
US2142226A
Cited
GB553569A
Cited
US2376725A
Cited
US2471744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |