US3660352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hindered phenol sulfide antioxidants for polymers
Assignee: Wyeth Holdings LLC
•
Filing: 1970-06-04
•
Granted: 1972-05-02
•
Expires: 1990-06-04
Abstract
Abstract COMPOUNDS OF THE TYPE REPRESENTED BY THE FORMULA: 2,4,6-TRI(R-),3-(R1-S-CH2-),5-R2-PHENOL WHEREIN EACH R IS INDEPENDENTLY A LOWER ALKYL GROUP, R1 IS HIGHER ALKYL OR HIGHER ALKYLBENZYL, R2 IS HYDROGEN OR THE GROUP -CH2SR1, AND THEIR USE AS EFFECTIVE ANTIOXIDANTS FOR ORGANIC MATERIALS NORMALLY SUBJECT OT OXIDATIVE DETERIORATION, ESPECIALLY POLYOLEFINS.
Inventors
- 👤 John Song
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:50
CPC Classifications
C; C07; C07C; C07C323/00; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/375; Y; Y10; Y10S; Y10S524/00; Y10S524/925
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |