US2981942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse echo systems
Assignee: Raytheon Co
•
Filing: 1952-01-23
•
Granted: 1961-04-25
•
Expires: 1972-01-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas A O Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:38
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/12; G01S13/106; G01S7/00; G01S7/02; G01S7/28; G01S7/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2091134A
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US2404527A
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US2542983A
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US2423024A
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US2435960A
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US2425600A
Cited
US2568441A
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US2946050A
Cited
US2606316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |