US2675366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polyethylene
Assignee: Wyeth Holdings LLC
•
Filing: 1951-05-24
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Granted: 1954-04-13
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Expires: 1971-05-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Pullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A METHOD OF CONTROLLING OXIDATIVE DETERIORATION IN POLYETHYLENE WHICH COMPRISES INCORPORATING THEREIN A SMALL AMOUNT, SUFFICIENT TO REDUCE OXIDATION THEREIN, OF A 2,2''-METHYLENE BIS-(4,6DIALKYLPHENOL).
Claim 2
Independent Claim
24 words
A METHOD OF CONTROLLING OXIDATIVE DETERIORATION IN POLYETHYLENE WHICH COMPRISES INCORPORATING THEREIN A SMALL AMOUNT, SUFFICIENT TO REDUCE OXIDATION THEREIN, OF A 2,2''-METHYLENE BIS-(4,6DIALKYLPHENOL).
References Cited (Backward Citations)
US2434662A
Cited
US2538355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |