US3335104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of crystalline polypropylene
Assignee: Stauffer Chemical Co
•
Filing: 1962-06-22
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Granted: 1967-08-08
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Expires: 1982-06-22
Abstract
No abstract record available.
Inventors
- 👤 Adam F Kopacki
- 👤 Robert H Messing
- 👤 Levine Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A SOLID SUBSTANTIALLY LINEAR POLYPROPYLENE STABILIZED AGAINST DISCOLORATION AND THERMAL DEGRADATION COMPRISING IN COMBINATION WITH THE POLYPROPYLENE A MONO-SUBSTITUTED PHENOLIC DISULFIDE OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
25 words
A SOLID SUBSTANTIALLY LINEAR POLYPROPYLENE STABILIZED AGAINST DISCOLORATION AND THERMAL DEGRADATION COMPRISING IN COMBINATION WITH THE POLYPROPYLENE A MONO-SUBSTITUTED PHENOLIC DISULFIDE OF THE FOLLOWING FORMULA:
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US3129213A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |