US2453837A
Expired / Lapsed
US
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Apparatus for alkylation
Assignee: Standard Oil Development Co
•
Filing: 1943-10-15
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Granted: 1948-11-16
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Expires: 1963-10-15
Abstract
No abstract record available.
Inventors
- 👤 Edward J Fisher
- 👤 William B Franklin
- 👤 Delmas A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:56
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/242; B01J14/00; C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00105; B01J2219/0011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |