Patent US2814448A successfully refreshed from Google Patents.
US2814448A
Expired / Lapsed
US
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Automotive heating system
Assignee: Motors Liquidation Co
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Filing: 1952-06-02
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Granted: 1957-11-26
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Expires: 1972-06-02
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Schutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:23
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/02; B60H1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR829324A
Cited
US2325427A
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US2391408A
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US2445392A
Cited
US2490919A
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US2586689A
Cited
US2729158A
Cited
US2631517A
Cited
US2727692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |