US2331879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of servicing underground liquefied petroleum gas tanks during cold weather
Assignee: Southern Steel Co
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Filing: 1940-01-17
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Granted: 1943-10-19
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Expires: 1960-01-17
Abstract
No abstract record available.
Inventors
- 👤 Loyd J White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:37
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/80; B60; B60P; B60P3/00; B60P3/22; B60P3/2295; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313; Y10T137/6416; Y10T137/6579
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) | 1946-10-18 | 1947-04-19 | 1947-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-18 | 1951-04-19 | 1951-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-18 | 1955-04-19 | 1955-10-19 | $7700.00 | Window Closed / Lapsed |