Patent US3213263A successfully refreshed from Google Patents.
US3213263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater for oil pans of internal combustion engines
Assignee: Kim Hotstart Manufacturing Co Inc
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Filing: 1963-11-12
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Granted: 1965-10-19
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 William A Steenbergen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:09
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |