US2438852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage alkylation method
Assignee: Texaco Inc
•
Filing: 1945-01-23
•
Granted: 1948-03-30
•
Expires: 1965-01-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Goldsby
- 👤 Claude W Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:42
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/922; Y10S585/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2002394A
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US2222012A
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US2260990A
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US2246703A
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US2322482A
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US2311144A
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US2366627A
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US2374262A
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US2379368A
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US2402905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |