US2544242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible bulkhead and air circulating fan assembly for refrigerator cars
Assignee: Preco LLC
•
Filing: 1947-08-09
•
Granted: 1951-03-06
•
Expires: 1967-08-09
Abstract
No abstract record available.
Inventors
- 👤 William E Van Dorn
- 👤 Paul K Beemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:59
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0018; B61D27/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2102182A
Cited
US2349315A
Cited
US2314463A
Cited
US2324749A
Cited
US2328820A
Cited
US2331002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |