US2508749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Neu SA
•
Filing: 1948-02-04
•
Granted: 1950-05-23
•
Expires: 1968-02-04
Abstract
No abstract record available.
Inventors
- 👤 Denis Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:32
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B60; B60H; B60H1/00; B60H1/00007; B63; B63J; B63J2/00; B63J2/02; Y; Y02; Y02T; Y02T50/00; Y02T50/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |