US2634669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilation system for automobiles and the like
Assignee: Individual
•
Filing: 1948-02-25
•
Granted: 1953-04-14
•
Expires: 1968-02-25
Abstract
No abstract record available.
Inventors
- 👤 Leo S Greenmun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:54
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/24; B60H1/26; B60H1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2342872A
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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) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |