US2877189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber antioxidants in extruded form
Assignee: Pennwalt Corp
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Filing: 1953-06-26
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Granted: 1959-03-10
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Expires: 1973-06-26
Abstract
No abstract record available.
Inventors
- 👤 John F Olin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:07
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08J2321/00; C08J2423/00; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE RUBBER ANTIOXIDANT PRODUCT COMPRISING A SOLID AROMATIC SECONDARY AMINE ANTIOXDANT IN INTIMATE ADMIXTURE WITH A POLYBUTENE MATERIAL OF THE GROUP CONSISTING OF POLYBUTENE AND HYDROGENATED POLYBUTENE, THE AVERAGE MOLECULAR WEIGHT OF THE POLYBUTENE MATERIAL BEING BETWEEN 500 AND 5000 AND THE AMOUNT ADMIXED BEING BETWEEN 1 AND 10% BASED ON THE SAID ANTIOXIDANT.
Claim 2
Dependent Claim
54 words
THE RUBBER ANTIOXIDANT PRODUCT COMPRISING A SOLID AROMATIC SECONDARY AMINE ANTIOXDANT IN INTIMATE ADMIXTURE WITH A POLYBUTENE MATERIAL OF THE GROUP CONSISTING OF POLYBUTENE AND HYDROGENATED POLYBUTENE, THE AVERAGE MOLECULAR WEIGHT OF THE POLYBUTENE MATERIAL BEING BETWEEN 500 AND 5000 AND THE AMOUNT ADMIXED BEING BETWEEN 1 AND 10% BASED ON THE SAID ANTIOXIDANT.
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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |