Patent US2442878A successfully refreshed from Google Patents.
US2442878A
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US
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Manufacture of alkylated aromatic hydrocarbons
Assignee: Universal Oil Products Co
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Filing: 1943-04-29
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Granted: 1948-06-08
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Expires: 1963-04-29
Abstract
No abstract record available.
Inventors
- 👤 Schmerling Louis
- 👤 Vladimir N Ipatieff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:53
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/862; C07C2/864; C07C17/00; C07C17/26; C07C17/272; C07C17/275; C07C37/00; C07C37/11; C07C37/16; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2246762A
Cited
GB464752A
Cited
US2301966A
Cited
US2183552A
Cited
US2140782A
Cited
US2290211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |