Patent US2399903A successfully refreshed from Google Patents.
US2966823A
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Tracking telescope with dual field optical system
Assignee: Northrop Grumman Corp
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Filing: 1948-08-21
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Granted: 1961-01-03
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Expires: 1968-08-21
Abstract
No abstract record available.
Inventors
- 👤 Richard H Trimble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:49
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/785; G01S3/786; G01S3/7867
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2278505A
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US2409186A
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US2513367A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |