Patent US2454869A successfully refreshed from Google Patents.
US2454869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation method
Assignee: Texaco Inc
•
Filing: 1943-02-24
•
Granted: 1948-11-30
•
Expires: 1963-02-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Goldsby
- 👤 Claude W Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:03
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; B; B01; B01J; B01J10/00; B01J10/002; B01J19/00; B01J19/18; B01J19/1868; B01J19/1875; B01J4/00; B01J4/001; B01J4/004; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00141; B01J2219/00; B01J2219/00002; B01J2219/00027; B01J2219/0004; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00105; B01J2219/0011
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1333328A
Cited
US1941111A
Cited
US1971852A
Cited
US2024680A
Cited
US2002394A
Cited
US2131191A
Cited
US2222012A
Cited
US2312719A
Cited
US2246703A
Cited
US2322482A
Cited
US2238802A
Cited
US2317901A
Cited
US2335704A
Cited
US2311144A
Cited
US2308786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |