US2762787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preservation of natural and synthetic rubber and rubber articles
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1953-11-24
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Granted: 1956-09-11
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Expires: 1973-11-24
Abstract
No abstract record available.
Inventors
- 👤 Goodman Isaac
- 👤 Lambert Arthur
- 👤 Smith John Frederick
- 👤 Williams Gwyn Eifion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A COMPOSITION COMPRISING A MEMBER OF THE GROUP CONSISTING OF NATURAL RUBBER AND SYNTHETIC RUBBER POLYMERS OBTAINED BY POLYMERIZING A DIOLEFINIC COMPOUND, AND LATICES THEREOF, HAVING INCORPORATED THEREIN, AS AN ANTIOXIDANT, AN ALPHA, BETA-BIS-(2-HYDROXY-5-METHYLPHENYL)-ETHANE IN WHICH THERE IS IN THE 3-POSITION OF EACH OF THE TWO PHENYL RADICALS A SUBSTITUENT WITH NOT MORE THAN 8 CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL, AND ALKYLCYCLOALKYL.
Claim 2
Dependent Claim
67 words
A COMPOSITION COMPRISING A MEMBER OF THE GROUP CONSISTING OF NATURAL RUBBER AND SYNTHETIC RUBBER POLYMERS OBTAINED BY POLYMERIZING A DIOLEFINIC COMPOUND, AND LATICES THEREOF, HAVING INCORPORATED THEREIN, AS AN ANTIOXIDANT, AN ALPHA, BETA-BIS-(2-HYDROXY-5-METHYLPHENYL)-ETHANE IN WHICH THERE IS IN THE 3-POSITION OF EACH OF THE TWO PHENYL RADICALS A SUBSTITUENT WITH NOT MORE THAN 8 CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL, AND ALKYLCYCLOALKYL.
References Cited (Backward Citations)
US2538355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |