Patent US2316237A successfully refreshed from Google Patents.
US2316237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for controlling the supply of air to the closed cabins of aircraft
Assignee: Individual
•
Filing: 1941-01-04
•
Granted: 1943-04-13
•
Expires: 1961-01-04
Abstract
No abstract record available.
Inventors
- 👤 Grunert Siegfried
- 👤 Ide Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:35
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7737
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-04-12 | 1946-10-12 | 1947-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-04-12 | 1950-10-12 | 1951-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-04-12 | 1954-10-12 | 1955-04-13 | $7700.00 | Window Closed / Lapsed |