US3781242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light stabilized polypropylene containing a hindered phenol,a phosphite and a benzotriazole
Assignee: Phillips Petroleum Co
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Filing: 1972-02-17
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Granted: 1973-12-25
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Expires: 1992-02-17
Abstract
Abstract POLYMERIC COMPOSITIONS ARE STABILIZED AGAINST DEGRADATION IN PHYSICAL AND CHEMICAL PROPERTIES FROM EXPOSURE TO ACTINIC RADIATION BY INCORPORATION INTO SUCH COMPOSITIONS AN ADDITIVE SYSTEM COMPRISING AT LEAST ONE SECONDARY ORGANIC PHOSPHITE ESTER IN COMBINATION WITH AT LEAST ONE 2(2''-HYDROXY-5''-ALKYLPHENYL)BENZOTRIAZOLE. OPTIONALLY, THE STABILIZER ADDITIVE SYSTEMS FURTHER COMPRISE HINDERED PHENOLS.
Inventors
- 👤 R Mathis
- 👤 J Guillory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475; C08K5/04; C08K5/13; C08K5/134; C08K5/1345; C08K5/49; C08K5/51; C08K5/52; C08K5/524
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |