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US2229081A
Expired / Lapsed
US
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Double-walled vacuum insulated tank car
Assignee: Linde Air Products Co
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Filing: 1939-08-19
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Granted: 1941-01-21
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Expires: 1959-08-19
Abstract
No abstract record available.
Inventors
- 👤 Odd A Hansen
- 👤 James G Van Vleet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:06
CPC Classifications
B; B61; B61D; B61D5/00; B61D5/008; Y; Y10; Y10S; Y10S220/00; Y10S220/901; Y10T; Y10T137/00; Y10T137/2713; Y10T137/6851; Y10T137/6855; Y10T137/6866; Y10T137/6869; Y10T137/8593; Y10T137/86292; Y10T137/86324
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) | 1944-01-21 | 1944-07-22 | 1945-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-21 | 1948-07-22 | 1949-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-21 | 1952-07-22 | 1953-01-21 | $7700.00 | Window Closed / Lapsed |