US2485886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triple gate
Assignee: United States Department of the Navy
•
Filing: 1946-02-21
•
Granted: 1949-10-25
•
Expires: 1966-02-21
Abstract
No abstract record available.
Inventors
- 👤 Charles W Johnstone
- 👤 Leonard P Mautner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:35
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2136621A
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US2146862A
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US2404918A
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US2406760A
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US2426454A
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US2369662A
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US2405930A
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US2406165A
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US2435207A
Cited
US2444950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |