US2548092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled hollow article
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1949-10-06
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Granted: 1951-04-10
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Expires: 1969-10-06
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Bartlett
- 👤 Milton S Roush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:58
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/12; F01L3/14; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/181
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |