US2869450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air register of the wall type
Assignee: AIR CONTROL PRODUCTS Inc
•
Filing: 1955-06-06
•
Granted: 1959-01-20
•
Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Robert L Leigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:12
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734445A
Cited
US705609A
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US2250330A
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US2553866A
Cited
US2541346A
Cited
US2567789A
Cited
US2656781A
Cited
US2708869A
Cited
US2747495A
Cited
US2741970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |