US2459636A
Expired / Lapsed
US
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Alkylation method and apparatus
Assignee: Texaco Inc
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Filing: 1945-04-25
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Granted: 1949-01-18
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Expires: 1965-04-25
Abstract
No abstract record available.
Inventors
- 👤 William N Fenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:11
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J19/0053; B01J19/0066; B01J19/18; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00083; B01J2219/18; B01J2219/185; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/955
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) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |