Patent US1896673A successfully refreshed from Google Patents.
US1896673A
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Safety cut-off valve for refrigerator cars
Assignee: North American Car Corp
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Filing: 1930-11-06
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Granted: 1933-02-07
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Expires: 1950-11-06
Abstract
No abstract record available.
Inventors
- 👤 Kopsa Julius
- 👤 Jr Edmund D Brigham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:47
CPC Classifications
F; F25; F25D; F25D11/00; F25D11/003; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1789; Y10T137/2496; Y10T137/2703; Y10T137/598; Y10T137/612; Y10T137/613; Y10T137/6416; Y10T137/6579; Y10T137/6851; Y10T137/6855; Y10T137/6866; Y10T137/7722; Y10T137/7723; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7766; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7792; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 0
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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) | 1936-02-07 | 1936-08-08 | 1937-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-07 | 1940-08-08 | 1941-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-07 | 1944-08-08 | 1945-02-07 | $7700.00 | Window Closed / Lapsed |