US2556277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-operating valve for aircraft cooling systems
Assignee: Glenn L Martin Co
•
Filing: 1945-02-22
•
Granted: 1951-06-12
•
Expires: 1965-02-22
Abstract
No abstract record available.
Inventors
- 👤 Hill Thomas Gardner
- 👤 Arthur N Curl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:21
CPC Classifications
B; B64; B64D; B64D33/00; B64D33/08; F; F01; F01P; F01P7/00; F01P7/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US995057A
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US1330265A
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US1255147A
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US1471078A
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US1890678A
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GB394221A
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US2199307A
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US2158293A
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US2381678A
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US2380777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |