Patent US3282891A successfully refreshed from Google Patents.
US3282891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene stabilized with a combination of glycerol and phenols
Assignee: Exxon Mobil Corp
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Filing: 1959-02-16
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Granted: 1966-11-01
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Expires: 1979-02-16
Abstract
No abstract record available.
Inventors
- 👤 Delos E Bown
- 👤 Norman P Neureiter
- 👤 Isaac J Satterfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/05; C08K5/053; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A COLOR STABLE POLYMER COMPOSITION COMPRISING NORMALLY SOLID HIGH MOLECULAR WEIGHT POLYPROPYLENE CONTAMINATED WITH LESS THAN 10 P.P.M. OF TITANIUM AND HAVING INCORPORATED THEREIN FROM ABOUT 0.05 TO 2 WEIGHT PERCENT OF GLYCEROL AND ABOUT 005 TO 5 WEIGHT PERCENT OF AN OXIDATION INHIBITOR SELECTED FROM THE CLASS CONSISTING OF 2,2''-METHYLENEBIS(4-METHYL-6-TERTIARYBUTYLPHENOL), 4,4''-THIOBIS(3-METHYL-6-TERTIARYBUTYLPHENOL), 4,4''-METHYLBENEBIS(2,6-DITERTIARYBUTYLPHENOL) AND 4,4''-METHYLENEBIS(2-METHYL-6-TERTIARYBUTYLPHENOL).
Claim 2
Dependent Claim
55 words
A COLOR STABLE POLYMER COMPOSITION COMPRISING NORMALLY SOLID HIGH MOLECULAR WEIGHT POLYPROPYLENE CONTAMINATED WITH LESS THAN 10 P.P.M. OF TITANIUM AND HAVING INCORPORATED THEREIN FROM ABOUT 0.05 TO 2 WEIGHT PERCENT OF GLYCEROL AND ABOUT 005 TO 5 WEIGHT PERCENT OF AN OXIDATION INHIBITOR SELECTED FROM THE CLASS CONSISTING OF 2,2''-METHYLENEBIS(4-METHYL-6-TERTIARYBUTYLPHENOL), 4,4''-THIOBIS(3-METHYL-6-TERTIARYBUTYLPHENOL), 4,4''-METHYLBENEBIS(2,6-DITERTIARYBUTYLPHENOL) AND 4,4''-METHYLENEBIS(2-METHYL-6-TERTIARYBUTYLPHENOL).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |