Patent EP0661073A1 successfully refreshed from Google Patents.
US2618183A
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Assignee: Northrop Grumman Corp
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Filing: 1951-05-01
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Granted: 1952-11-18
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Expires: 1971-05-01
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Cooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:10
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/003; H01J9/006; H05; H05K; H05K13/00; H05K13/0007; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53274; Y10T29/53283; Y10T29/53796; Y10T29/53896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US541701A
Cited
US1023077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |