US2523104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating attachment for vehicles
Assignee: Individual
•
Filing: 1947-10-03
•
Granted: 1950-09-19
•
Expires: 1967-10-03
Abstract
No abstract record available.
Inventors
- 👤 Walter E Emmert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/24; B60H1/248
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE342217C
Cited
GB214287A
Cited
US1618152A
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GB330878A
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US1820430A
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US1935456A
Cited
US1956123A
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US2087651A
Cited
US2084787A
Cited
GB432298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |