US2604837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilation control means for vehicles
Assignee: Individual
•
Filing: 1949-04-25
•
Granted: 1952-07-29
•
Expires: 1969-04-25
Abstract
No abstract record available.
Inventors
- 👤 John C Backe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:49
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/24; B60H1/247
Claims Analysis
Total Claims: 0
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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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |