US2742844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and ventilating systems for vehicles
Assignee: S Smith and Sons Ltd
•
Filing: 1951-11-17
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Granted: 1956-04-24
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Expires: 1971-11-17
Abstract
No abstract record available.
Inventors
- 👤 Clifford S Steadman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:18
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00007; B60H1/00021; B60H1/00064; B60H1/00071; B60H2001/0015; B60H2001/00164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB229012A
Cited
US2445392A
Cited
US2488278A
Cited
US2430759A
Cited
US2492506A
Cited
US2495883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |