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US3206431A
Expired / Lapsed
US
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Thermoplastic polymers containing 3,5-dialkyl-4-hydroxybenzoic acid esters as u.v. stabilizers
Assignee: Shell USA Inc
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Filing: 1964-09-15
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Granted: 1965-09-14
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Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 Marshall E Doyle
- 👤 Gunter S Jaffe
- 👤 Edgar J Smutny
- 👤 Paul H Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:52
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/01; C07C65/03; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/134; C08K5/1345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PLASTIC COMPOSITION COMPRISING A NORMALLY SOLID, ORGANIC, THERMOPLASTIC POLYMER SUBJECT TO ACTINIC DEGRADATION, CONTAINING A STABILIZING AMOUNT OF AN ESTER OF (A) 3,5-DIALKYL-4-HYDROXYBENZOIC ACID WHEREOF AT LEAST ONE OF THE ALKYL GROUPS IS BRANCED ON THE ALPHA CARBON ATOM, AND (B) A HYDROCARBON COMPOUND SUBSTITUTED WITH AT LEAST ONE HYDROXYL GROUP, IN WHICH ANY ADDITIONAL SUBSTITUENTS ARE RADICALS SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS, ALKOXY RADIALS, CARBALKOXY RADICALS AND HALOGEN RADICALS.
Claim 2
Dependent Claim
74 words
A PLASTIC COMPOSITION COMPRISING A NORMALLY SOLID, ORGANIC, THERMOPLASTIC POLYMER SUBJECT TO ACTINIC DEGRADATION, CONTAINING A STABILIZING AMOUNT OF AN ESTER OF (A) 3,5-DIALKYL-4-HYDROXYBENZOIC ACID WHEREOF AT LEAST ONE OF THE ALKYL GROUPS IS BRANCED ON THE ALPHA CARBON ATOM, AND (B) A HYDROCARBON COMPOUND SUBSTITUTED WITH AT LEAST ONE HYDROXYL GROUP, IN WHICH ANY ADDITIONAL SUBSTITUENTS ARE RADICALS SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS, ALKOXY RADIALS, CARBALKOXY RADICALS AND HALOGEN RADICALS.
References Cited (Backward Citations)
US2464250A
Cited
US3085003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |