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Patent US3469072A successfully refreshed from Google Patents.
US3469072A
Expired / Lapsed
US
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Electric heating system for motor vehicles
Assignee: Motors Liquidation Co
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Filing: 1964-12-11
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Granted: 1969-09-23
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Expires: 1984-12-11
Abstract
No abstract record available.
Inventors
- 👤 Richard A Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:33
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00271; B60H1/00278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2731807A
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US1550524A
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US1861809A
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US2611853A
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US2819373A
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US2856543A
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US3180403A
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US3174048A
Cited
US3300619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |