US3733365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for ortho-alkylation
Assignee: Texaco Inc
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Filing: 1969-05-05
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Granted: 1973-05-15
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Expires: 1989-05-05
Abstract
Abstract AROMATIC COMPOUNDS SUCH AS HYDROXYAROMATICS AND AROMATIC AMINES ARE SELECTIVELY ORTHO-ALKYLATED WITH AN OLEFIN IN THE PRESENCE OF A CATALYST OF A POLYMERIC ALUMINUM ALCOHOLATE, ALUMINUM HYDROXIDE CONDENSED WITH AN ALUMINUM ALCOHOLATE, OR ACTIVE ALUMINA ACTIVATED WITH AN ALUMINUM ALCOHOLATE. THE ORTHO-ALKYLATED PRODUCTS OF OUR INVENTION ARE USED INDUSTRIALLY AS ANTIDEGRADANTS FOR MATERIALS SUBJECT TO DEGRADATION CAUSED BY OXYGEN OR OZONE.
Inventors
- 👤 E Yeakey
- 👤 C Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:33
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68; B; B01; B01J; B01J31/00; B01J31/02; B01J31/0201; B01J31/0211; B01J31/0212; C07C37/00; C07C37/11; C07C37/14; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/323; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |