US2959567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene stabilized with tetraalkanol substituted ethylene diamines
Assignee: Dow Chemical Co
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Filing: 1956-01-26
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Granted: 1960-11-08
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Expires: 1976-01-26
Abstract
No abstract record available.
Inventors
- 👤 Charles R Pfeifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:56
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
NON-CORROSIVE COMPOSITION COMPRISING POLYETHYLENE PREPARED BY POLYMERIZING ETHYLENE IN THE PRESENCE OF A HALOGEN-CONTAINING CATALYST FORMED BY ADMIXING (1) A STRONG REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS, DIALKYL ALUMINUM HALIDES, DIALKYL ALUMINUM HYDRIDES AND DIALKYL ALUMINUM ALKOXIDES AND (2) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HALOGENIDES, OXYHALOGENIDES, COMPLEX HALOGENIDES, FRESHLY PRECIPITATED OXIDES, FRESHLY PRECIPITATED HYDROXIDES, ALCOHOLATES, ACETATES, BENZOATES AND ACETYL ACETONATES OF THE GROUP IV-B, V-B AND VI-B METALS OF THE MENDELYEEV PERIODIC SYSTEM, SAID POLYETHYLENE CONTAINING HALOGENINCLUDING CATALYST RESIDUES AFTER HAVING BEEN POLYMERIZED AND AS AN OXIDATIVE-CORROSION-INHIBITOR, BETWEEN ABOUT 0.005 AND 5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF A TETRA-ALKANOL-SUBSTITUTED DERIVATIVE OF ETHYLENE DIAMINE IN WHICH EACH ALKANOL SUBSTITUENT CONSISTS OF A MONOHYDROXY ALKYL GROUP THAT CONTAINS NOT MORE THAN THREE CARBON ATOMS THEREIN.
Claim 2
Dependent Claim
136 words
NON-CORROSIVE COMPOSITION COMPRISING POLYETHYLENE PREPARED BY POLYMERIZING ETHYLENE IN THE PRESENCE OF A HALOGEN-CONTAINING CATALYST FORMED BY ADMIXING (1) A STRONG REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS, DIALKYL ALUMINUM HALIDES, DIALKYL ALUMINUM HYDRIDES AND DIALKYL ALUMINUM ALKOXIDES AND (2) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HALOGENIDES, OXYHALOGENIDES, COMPLEX HALOGENIDES, FRESHLY PRECIPITATED OXIDES, FRESHLY PRECIPITATED HYDROXIDES, ALCOHOLATES, ACETATES, BENZOATES AND ACETYL ACETONATES OF THE GROUP IV-B, V-B AND VI-B METALS OF THE MENDELYEEV PERIODIC SYSTEM, SAID POLYETHYLENE CONTAINING HALOGENINCLUDING CATALYST RESIDUES AFTER HAVING BEEN POLYMERIZED AND AS AN OXIDATIVE-CORROSION-INHIBITOR, BETWEEN ABOUT 0.005 AND 5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF A TETRA-ALKANOL-SUBSTITUTED DERIVATIVE OF ETHYLENE DIAMINE IN WHICH EACH ALKANOL SUBSTITUENT CONSISTS OF A MONOHYDROXY ALKYL GROUP THAT CONTAINS NOT MORE THAN THREE CARBON ATOMS THEREIN.
References Cited (Backward Citations)
US2013941A
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US2043257A
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US2365400A
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US2432586A
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US2681328A
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BE533362A
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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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |