US3475613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-photocell network for detecting small-area radiation source in presence of large area background noise radiation
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1967-10-09
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Granted: 1969-10-28
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Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 William G Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:41
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/02; G01R29/027; G01R29/0273; G01S; G01S7/00; G01S7/48; G01S7/483; G01S7/486; G01S7/487
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3349244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |