US2439554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air register
Assignee: Individual
•
Filing: 1945-07-25
•
Granted: 1948-04-13
•
Expires: 1965-07-25
Abstract
No abstract record available.
Inventors
- 👤 Arleigh W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
F; F23; F23D; F23D11/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1790395A
Cited
US1434406A
Cited
US1680455A
Cited
US1978128A
Cited
US2126853A
Cited
US2284708A
Cited
US2271587A
Cited
US2320575A
Cited
US2325444A
Cited
US2380463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |