US2519618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporator and fluid contact apparatus
Assignee: Shell Development Co
•
Filing: 1947-07-25
•
Granted: 1950-08-22
•
Expires: 1967-07-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Wilson
- 👤 Edward B Wist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:33
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/06; B01D1/10; Y; Y10; Y10S; Y10S159/00; Y10S159/02; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1863781A
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US2094959A
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US1951812A
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US2096407A
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US2054734A
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US2316832A
Cited
US2289953A
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US2207390A
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US2385200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |