Patent US3317517A successfully refreshed from Google Patents.
US3435452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surrogate viewing system
Assignee: United States Department of the Navy
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Filing: 1967-08-25
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Granted: 1969-03-25
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Expires: 1987-08-25
Abstract
No abstract record available.
Inventors
- 👤 David D Kilpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:32
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/001; G09G3/003; G01; G01S; G01S1/00; G01S1/02; G06; G06F; G06F3/00; G06F3/14; G06F3/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2770166A
Cited
US2959779A
Cited
US3136999A
Cited
US3237194A
Cited
US3284799A
Cited
US3730819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |