US2541069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid thermal diffusion apparatus
Assignee: Standard Oil Co
•
Filing: 1947-06-07
•
Granted: 1951-02-13
•
Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 Jones Arthur Letcher
- 👤 Everett C Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:50
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/2425; B01D; B01D17/00; B01D17/005; C; C07; C07C; C07C7/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00085; B01J2219/00164; B01J2219/00168; B01J2219/00186; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/919; Y10S585/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1174631A
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US1864511A
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US2158238A
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GB509618A
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US2268134A
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DE738812C
Cited
US2258594A
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US2411238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |