US2438215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of polyalkyl aromatics
Assignee: Universal Oil Products Co
•
Filing: 1943-02-08
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Granted: 1948-03-23
•
Expires: 1963-02-08
Abstract
No abstract record available.
Inventors
- 👤 Vladimir N Ipatieff
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:22
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1953702A
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US2010948A
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US2010949A
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US2189805A
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GB464752A
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US2238594A
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US2257920A
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US2367535A
Cited
US2373062A
Cited
US2372320A
Cited
US2382505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |