US2758533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automobile ventilator
Assignee: Individual
•
Filing: 1953-09-04
•
Granted: 1956-08-14
•
Expires: 1973-09-04
Abstract
No abstract record available.
Inventors
- 👤 Edith M Hill
- 👤 Hill Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:27
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/24; B60H1/26; B60H1/262
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR683101A
Cited
DE543644C
Cited
US1935456A
Cited
US2027259A
Cited
US2036485A
Cited
US2049701A
Cited
US2232108A
Cited
US2340252A
Cited
US2523104A
Cited
US2550353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |