US2851254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High altitude cabin pressurization and air conditioning system
Assignee: Lockheed Martin Corp
•
Filing: 1952-09-10
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Granted: 1958-09-09
•
Expires: 1972-09-10
Abstract
No abstract record available.
Inventors
- 👤 Bernard L Messinger
- 👤 Jr William W Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:51
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/02; B64D13/04; Y; Y02; Y02T; Y02T50/00; Y02T50/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2582848A
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US2585570A
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US2618470A
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US2485590A
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US2622406A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |