US3496855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Augmented automobile heating system
Assignee: Individual
•
Filing: 1968-08-02
•
Granted: 1970-02-24
•
Expires: 1988-08-02
Abstract
No abstract record available.
Inventors
- 👤 Harry De Boer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:18
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2215; B60H1/2225; B60S; B60S1/00; B60S1/02; B60S1/54; B60H2001/2268; B60H2001/2287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |