US2741971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating air distributing outlets
Assignee: L J WING Manufacturing CO
•
Filing: 1952-06-28
•
Granted: 1956-04-17
•
Expires: 1972-06-28
Abstract
No abstract record available.
Inventors
- 👤 Harry S Wheller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB267656A
Cited
US2000112A
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US1990801A
Cited
US2149885A
Cited
US2252954A
Cited
US2293748A
Cited
US2390630A
Cited
US2457934A
Cited
US2619892A
Cited
CH280098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |