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Patent US2396486A successfully refreshed from Google Patents.
US2396486A
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Paraffin alkylation process
Assignee: Shell Development Co
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Filing: 1940-09-05
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Granted: 1946-03-12
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Expires: 1960-09-05
Abstract
No abstract record available.
Inventors
- 👤 Seaver A Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:58
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/395; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2/86; C07C2/861; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-03-11 | 1949-09-10 | 1950-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-11 | 1953-09-10 | 1954-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-11 | 1957-09-10 | 1958-03-12 | $7700.00 | Window Closed / Lapsed |