US3507989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple observation system
Assignee: United States Department of the Navy
•
Filing: 1967-01-27
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Granted: 1970-04-21
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Expires: 1987-01-27
Abstract
No abstract record available.
Inventors
- 👤 Hanns H Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:45
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/26; F41G3/2616; F41G3/2694; G; G09; G09B; G09B9/00; G09B9/02; G09B9/06; G09B9/063; G09B9/08; G09B9/30; G09B9/301; G09B9/302; H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/2628; H04N5/272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2611819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |