US2420676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine signaling apparatus
Assignee: Submarine Signal Co
•
Filing: 1943-12-13
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Granted: 1947-05-20
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Expires: 1963-12-13
Abstract
No abstract record available.
Inventors
- 👤 Robert E Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:35
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/80; G01S3/802; G01S3/803; G01S3/8034; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/30; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1137222A
Cited
US1471547A
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US1472558A
Cited
US1344352A
Cited
US1588932A
Cited
GB279878A
Cited
US2166162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |