US2968641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polypropylene with an alpha-stage para-tertiaryalkylphenol-formaldehyde resin
Assignee: Union Carbide Corp
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Filing: 1958-05-14
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Granted: 1961-01-17
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Expires: 1978-05-14
Abstract
No abstract record available.
Inventors
- 👤 John S Roberts
- 👤 Julian K Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:26
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L2203/00; C08L2203/12; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A POLYPROPYLENE COMPOSITION COMPRISING A NORMALLY SOLID POLYPROPYLENE AND CONTAINING AN A-STAGE PARATERTIARYALKYLPHENOL-FORMALDEHYDE RESIN IN A SMALL AMOUNT SUFFICIENT TO STABILIZE SAID POLYPROPYLENE AGAINST OXIDATIVE DEGRADATION, WHEREIN THE TERTIARYALKYL GROUP OF THE PARATERTIARYLAKYLPHENOL CONTAINS FROM 4 TO ABOUT 20 CARBON ATOMS.
Claim 2
Dependent Claim
41 words
A POLYPROPYLENE COMPOSITION COMPRISING A NORMALLY SOLID POLYPROPYLENE AND CONTAINING AN A-STAGE PARATERTIARYALKYLPHENOL-FORMALDEHYDE RESIN IN A SMALL AMOUNT SUFFICIENT TO STABILIZE SAID POLYPROPYLENE AGAINST OXIDATIVE DEGRADATION, WHEREIN THE TERTIARYALKYL GROUP OF THE PARATERTIARYLAKYLPHENOL CONTAINS FROM 4 TO ABOUT 20 CARBON ATOMS.
References Cited (Backward Citations)
US2270959A
Cited
US2833755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |