Patent US3527533A successfully refreshed from Google Patents.
US3527533A
Expired / Lapsed
US
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Method and apparatus for deriving and processing topographical information
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1964-08-25
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Granted: 1970-09-08
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 William R Hook
- 👤 Roland H Dishington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:51
CPC Classifications
G; G01; G01C; G01C11/00; G01C11/02; G01C11/025; G03; G03B; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2616077A
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US2648838A
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US3078340A
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US3019292A
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US3109057A
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US3294903A
Cited
US3191170A
Cited
US3316348A
Cited
US3242484A
Cited
US3296579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |