US3274146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene stabilization
Assignee: Sunoco Inc
•
Filing: 1961-12-05
•
Granted: 1966-09-20
•
Expires: 1981-12-05
Abstract
No abstract record available.
Inventors
- 👤 Marilyn T Lecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:50
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K5/00; C08K5/04; C08K5/13; C08K5/49; C08K5/5398
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A LIGHT AND HEAT STABLE COMPOSITION COMPRISING SOLID, ISOTACTIC, SUBSTANTIALLY CRYSTALLINE POLYPROPYLENE AND A STABILIZING QUANTITY OF EACH OF OF (A) CARBON BLACK, (B) A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
29 words
A LIGHT AND HEAT STABLE COMPOSITION COMPRISING SOLID, ISOTACTIC, SUBSTANTIALLY CRYSTALLINE POLYPROPYLENE AND A STABILIZING QUANTITY OF EACH OF OF (A) CARBON BLACK, (B) A COMPOUND HAVING THE FORMULA:
References Cited (Backward Citations)
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US2824847A
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US3013003A
Cited
US2967845A
Cited
US2889306A
Cited
US3038878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |