US2500606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air ventilating device
Assignee: Individual
•
Filing: 1946-09-27
•
Granted: 1950-03-14
•
Expires: 1966-09-27
Abstract
No abstract record available.
Inventors
- 👤 Kurt J Dosmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:54
CPC Classifications
F; F24; F24F; F24F9/00; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US935850A
Cited
US955871A
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US1113179A
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US1129619A
Cited
US1657066A
Cited
US1649290A
Cited
US2217729A
Cited
FR813872A
Cited
US2097751A
Cited
US2210458A
Cited
US2209054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |