US3494540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automobile air conditioning system
Assignee: Individual
•
Filing: 1969-04-28
•
Granted: 1970-02-10
•
Expires: 1989-04-28
Abstract
No abstract record available.
Inventors
- 👤 Don P Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:04
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3227; B60H1/3229
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2456019A
Cited
US3449924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |