US2545563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air flow control apparatus
Assignee: Honeywell Inc
•
Filing: 1944-12-26
•
Granted: 1951-03-20
•
Expires: 1964-12-26
Abstract
No abstract record available.
Inventors
- 👤 Welch William Evert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:12
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02; B64D13/04
Claims Analysis
Total Claims: 0
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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) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |