Patent US2898175A successfully refreshed from Google Patents.
US2898175A
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Assignee: Northrop Grumman Corp
•
Filing: 1955-04-11
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Granted: 1959-08-04
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Expires: 1975-04-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Rex Rice
- 👤 Dilling Marion Ray
- 👤 Tyson Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:07
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US491557A
Cited
US2229696A
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US2712128A
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FR534442A
Cited
US2172511A
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US2278409A
Cited
US2403006A
Cited
DE843035C
Cited
US2658106A
Cited
US2651400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |