US2465610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkylated aromatic compounds
Assignee: Shell Development Co
•
Filing: 1943-04-19
•
Granted: 1949-03-29
•
Expires: 1963-04-19
Abstract
No abstract record available.
Inventors
- 👤 Henry N Short
- 👤 Olmsted Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:15
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1915781A
Cited
US2115332A
Cited
US2205996A
Cited
US2246592A
Cited
GB464752A
Cited
US2143493A
Cited
US2275312A
Cited
US2244512A
Cited
US2276171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-28 | 1952-09-27 | 1953-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-28 | 1956-09-27 | 1957-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-28 | 1960-09-27 | 1961-03-29 | $7700.00 | Window Closed / Lapsed |