Patent US4858570A successfully refreshed from Google Patents.
US3092979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerator car
Assignee: Canadian National Railway Co
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Filing: 1960-10-27
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Granted: 1963-06-11
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Expires: 1980-10-27
Abstract
No abstract record available.
Inventors
- 👤 Lamont John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:44
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0018; B61D27/0027
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A RAIL CAR HAVING A PAIR OF OPPOSITE SIDE DOORS; A CEILING, SIDE WALLS AND A PLATFORM DEFINING A LOADING SPACE AND DEFINING A PLENUM SURROUNDING SAID LOADING SPACE; A FAN MOUNTED IN SAID PLENUM ABOVE SAID LOADING SPACE; A DUCT EXTENDING TO BOTH SIDES OF SAID CAR ABOVE SAID DOORS AND COMMUNICATING WITH THE INTAKE OF SAID FAN; EACH DOOR HAVING AN OPENING AT ITS TOP EDGE COMMUNICATING WITH SAID DUCT AND AN OPENING AT ITS BOTTOM EDGE COMMUNICATING WITH THE PORTION OF SAID PLENUM BELOW SAID PLATFORM, SAID FAN HAVING ITS EXHAUST OPENING INTO SAID PLENUM PORTION ABOVE SAID CEILING; OPENABLE CLOSURE MEANS IN SAID DUCT ON BOTH SIDES OF SAID FAN, AND A MECHANICAL REFRIGERATION UNIT MOUNTED IN SAID DOOR.
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |