US2644389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser for air conditioning systems
Assignee: W B CONNOR ENGINEERING CORP
•
Filing: 1949-10-27
•
Granted: 1953-07-07
•
Expires: 1969-10-27
Abstract
No abstract record available.
Inventors
- 👤 George S Dauphinee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:40
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F16; F16L; F16L55/00; F16L55/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US312177A
Cited
US493295A
Cited
US1319526A
Cited
DE618C
Cited
US857098A
Cited
US1115873A
Cited
US1659880A
Cited
US1705778A
Cited
US1921457A
Cited
US2197614A
Cited
US2322969A
Cited
US2299299A
Cited
US2392393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |