US2274858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of isoparaffins with ethylene
Assignee: Union Oil Company of California
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Filing: 1938-05-02
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Granted: 1942-03-03
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Expires: 1958-05-02
Abstract
No abstract record available.
Inventors
- 👤 William E Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:19
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2523/00; C07C2523/02; C07C2523/06; C07C2523/38; C07C2523/48; C07C2523/50; C07C2523/70; C07C2523/72; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2527/06; C07C2527/08; C07C2527/10; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/24; C07C2527/25; C07C2531/00; C07C2531/02; C07C2531/04
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) | 1945-03-02 | 1945-09-01 | 1946-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-02 | 1949-09-01 | 1950-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-02 | 1953-09-01 | 1954-03-03 | $7700.00 | Window Closed / Lapsed |