US3501257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater for automobile cooling system
Assignee: CHESTER W HILTON
•
Filing: 1968-01-22
•
Granted: 1970-03-17
•
Expires: 1988-01-22
Abstract
No abstract record available.
Inventors
- 👤 Chester W Hilton
- 👤 Walter E Hebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:47
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2209; B60K; B60K11/00; B60K11/02; F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10; B60H2001/2268; B60H2001/2271
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1095509A
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US1639114A
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GB420835A
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US2097771A
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US2362972A
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US2551823A
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US2552845A
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US2775294A
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US2949106A
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US3118490A
Cited
US3418979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |