US2839274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system for automobiles
Assignee: POLIN ENTERPRISES Inc
•
Filing: 1952-09-06
•
Granted: 1958-06-17
•
Expires: 1972-09-06
Abstract
No abstract record available.
Inventors
- 👤 Polin Paul William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:41
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3201; B60H1/32011; F; F25; F25B; F25B15/00; F25B15/10; F25B27/00; F25B27/02; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02A30/274
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |