US2468831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of corrosive action of friedel-crafts type catalysts
Assignee: Texaco Inc
•
Filing: 1945-05-22
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Granted: 1949-05-03
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Expires: 1965-05-22
Abstract
No abstract record available.
Inventors
- 👤 Gordon H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:36
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J19/00; B01J19/02; C; C07; C07C; C07C5/00; C07C5/22; C07C5/2206; C07C5/2226; C07C5/2246; C07C5/2253; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786; C07C5/2789; B01J2219/00; B01J2219/02; B01J2219/025; B01J2219/0277; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2265548A
Cited
US2271043A
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US2266012A
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US2299716A
Cited
US2411483A
Cited
US2382753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |