US2575193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionating apparatus
Assignee: Standard Oil Co
•
Filing: 1947-10-30
•
Granted: 1951-11-13
•
Expires: 1967-10-30
Abstract
No abstract record available.
Inventors
- 👤 William A Shire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:49
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/14; G01N25/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB169605A
Cited
US1442414A
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US1723657A
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US1725925A
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US1711656A
Cited
CH152237A
Cited
US2143015A
Cited
US2317101A
Cited
US2369913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |