US3305522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber antioxidant
Assignee: Goodyear Tire and Rubber Co
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Filing: 1963-06-21
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Granted: 1967-02-21
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Ronald B Spacht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08G; C08G61/00; C08G61/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
AS OXIDIZABLE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYCHLOROPRENE, POLYISOPRENE, POLYBUTADIENE, COPOLYMERS OF BUTADIENE AND STYRENE, POLYPROPYLENE OXIDE, BUTYL RUBBERS, POLYETHYLENE, POLYPROPYLENE AND ETHYLENE-PROPYLENE COPOLYMERS CONTAINING AN ANTIOXIDANT AMOUNT OF A REACTION PRODUCT FORMED BY (1) REACTING AT A TEMPERATURE OF FROM 25 TO 160*C. IN THE PRESENCE OF A FRIEDEL-CRAFT TYPE CATALYST, ONE MOL OF DICYCLOPENTADIENE AND AT LEAST ONE MOL OF A PHENOLIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF PHENOL, PARA-CRESOL, MIXED META-PARA-CRESOL AND PARA-ETHYL PHENOL AND (2) FURTHER REACTING THE FIRST REACTION PRODUCT IN THE PRESENCE OF AN ACIDIC ALKYLATION CATALYST WITH AT LEAST ONE-HALF MOL OF AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE, TERTIARY AMYLENES AND TERTIARY HEXYLENES.
Claim 2
Dependent Claim
116 words
AS OXIDIZABLE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYCHLOROPRENE, POLYISOPRENE, POLYBUTADIENE, COPOLYMERS OF BUTADIENE AND STYRENE, POLYPROPYLENE OXIDE, BUTYL RUBBERS, POLYETHYLENE, POLYPROPYLENE AND ETHYLENE-PROPYLENE COPOLYMERS CONTAINING AN ANTIOXIDANT AMOUNT OF A REACTION PRODUCT FORMED BY (1) REACTING AT A TEMPERATURE OF FROM 25 TO 160*C. IN THE PRESENCE OF A FRIEDEL-CRAFT TYPE CATALYST, ONE MOL OF DICYCLOPENTADIENE AND AT LEAST ONE MOL OF A PHENOLIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF PHENOL, PARA-CRESOL, MIXED META-PARA-CRESOL AND PARA-ETHYL PHENOL AND (2) FURTHER REACTING THE FIRST REACTION PRODUCT IN THE PRESENCE OF AN ACIDIC ALKYLATION CATALYST WITH AT LEAST ONE-HALF MOL OF AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE, TERTIARY AMYLENES AND TERTIARY HEXYLENES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |