Patent US3218293A successfully refreshed from Google Patents.
US3218293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene stabilized with a combination of nickel and cobalt dithiocarbamates
Assignee: Sunoco Inc
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Filing: 1960-12-02
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Granted: 1965-11-16
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Expires: 1980-12-02
Abstract
No abstract record available.
Inventors
- 👤 William F Geigle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/375; C08K5/39
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A LIGHT-STABLE COMPOSITION COMPRISING SOLID, SUBSTANTIALLY CRYSTALLINE, ISOTACTIC POLYPROPYLENE AND A STABILIZING QUANTITY COMPRISING FROM ABOUT 0.005% TO ABOUT 5% BY WEIGHT OF EACH OF (1) A SUBSTANCE HAVING THE FORMULA:
Claim 2
Dependent Claim
31 words
A LIGHT-STABLE COMPOSITION COMPRISING SOLID, SUBSTANTIALLY CRYSTALLINE, ISOTACTIC POLYPROPYLENE AND A STABILIZING QUANTITY COMPRISING FROM ABOUT 0.005% TO ABOUT 5% BY WEIGHT OF EACH OF (1) A SUBSTANCE HAVING THE FORMULA:
References Cited (Backward Citations)
US2739122A
Cited
US2889295A
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US2868745A
Cited
US3001969A
Cited
US2947721A
Cited
US2972596A
Cited
US2964495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |