Patent US3378518A successfully refreshed from Google Patents.
US3378518A
Expired / Lapsed
US
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Polypropylene stabilizer with durylene bis-phenols
Assignee: Shell USA Inc
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Filing: 1959-09-28
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Granted: 1968-04-16
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Expires: 1979-09-28
Abstract
No abstract record available.
Inventors
- 👤 Marshall E Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:50
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035; C07; C07C; C07C37/00; C07C37/11; C07C37/16; C07C37/18; C07C37/64; C07C37/66; C07C39/00; C07C39/12; C07C39/15; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/182; C10L1/183; C10L1/1835; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A COMPOSITION COMPRISING NORMALLY SOLID POLYPROPYLENE STABILIZED AGAINST EMBRITTLEMENT BY INCORPORATION FO FROM ABOUT 0.01 TO ABOUT 2% BY WEIGHT OF BIS(2HYDROXY-3-TERT-BUTYL-5-METHYLPHENYL)DURENE.
Claim 2
Dependent Claim
22 words
A COMPOSITION COMPRISING NORMALLY SOLID POLYPROPYLENE STABILIZED AGAINST EMBRITTLEMENT BY INCORPORATION FO FROM ABOUT 0.01 TO ABOUT 2% BY WEIGHT OF BIS(2HYDROXY-3-TERT-BUTYL-5-METHYLPHENYL)DURENE.
References Cited (Backward Citations)
FR1020875A
Cited
GB758973A
Cited
FR1171286A
Cited
US2985617A
Cited
GB806014A
Cited
US2957849A
Cited
AT205495B
Cited
US3062895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |