Patent USRE33972E successfully refreshed from Google Patents.
Patent US2250618A successfully refreshed from Google Patents.
US2250618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Yellow Truck and Coach Manufacturing Co
•
Filing: 1939-02-25
•
Granted: 1941-07-29
•
Expires: 1959-02-25
Abstract
No abstract record available.
Inventors
- 👤 Dwight E Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:44
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00357; B60H1/00371; B60H1/00007; B60H1/00207; B60H2001/00221
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-07-28 | 1945-01-27 | 1945-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-28 | 1949-01-27 | 1949-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-28 | 1953-01-27 | 1953-07-29 | $7700.00 | Window Closed / Lapsed |