Patent US4307720A successfully refreshed from Google Patents.
Patent US1393878A successfully refreshed from Google Patents.
Patent US2509899A successfully refreshed from Google Patents.
US2509899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft air conditioning system
Assignee: Garrett Corp
•
Filing: 1946-02-25
•
Granted: 1950-05-30
•
Expires: 1966-02-25
Abstract
No abstract record available.
Inventors
- 👤 Homer J Wood
- 👤 Horace R Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:26
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |