Patent US2776562A successfully refreshed from Google Patents.
US2776562A
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US
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Constant temperature air supply
Assignee: North American Aviation Corp
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Filing: 1954-09-20
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Granted: 1957-01-08
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Expires: 1974-09-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert P Davie
- 👤 Jr Eugene L Spearman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:07
CPC Classifications
G; G01; G01M; G01M9/00; G01M9/02; G01M9/04
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) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |