Patent US3795700A successfully refreshed from Google Patents.
US3795700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of 4-alkyl-2,6-dimethyl-3-hydroxybenzyl alcohol
Assignee: Wyeth Holdings LLC
•
Filing: 1971-03-10
•
Granted: 1974-03-05
•
Expires: 1991-03-10
Abstract
Abstract COMPOUNDS OF THE FORMULA: ((2,6-DI(CH3-),3-(HO-),4-R-PHENYL)-CH2-OOC)N-Y WHEREIN R IS A BRANCHED CHAIN ALKYL GROUP CONTAINING THREE TO ABOUT TWELVE CARBON ATOMS; Y IS THE RESIDUE OF THE CARBOXYLIC ACID Y(COOH)N, PROVIDED THAT WHEN Y IS ALKYL AND N IS ONE, Y CONTAINS MORE THAN TEN CARBON ATOMS; AND N IS ONE TO FOUR. THESE COMPOUNDS ARE USEFUL AS ANTIOXIDANTS IN ORGANIC SUBSTRATES, SUCH AS POLYOLEFINES, RUBBER, ETC.
Inventors
- 👤 J Song
- 👤 H Richmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:03
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08; C07; C07C; C07C323/00; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/105
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |