Patent US2952658A successfully refreshed from Google Patents.
US2952658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyethylene stabilized with alkali phosphates
Assignee: Dow Chemical Co
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Filing: 1955-12-19
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Granted: 1960-09-13
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Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Charles R Pfeifer
- 👤 Mark R Kinter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:08
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A NON-CORROSIVE COMPOSITION COMPRISING POLYETHYLENE PREPARED BY POLYMERIZING ETHYLENE IN THE PRESENCE OF A HALOGEN-CONTAINING CATALYST FORMED BY ADMIXING AN ALUMINUM ALKYL WITH A TITANIUM HALIDE, SAID POLYMETHYLENE CONTAINING HALOGEN-INCLUDING CATALYST RESIDUES AFTER HAVING BEEN POLYMERIZED WHICH CAUSE THE PRESENCE OF HYDROGEN HALIDE IN THE POLYMERIZED MATERIAL, AND BETWEEN ABOUT 0.005 PERCENT AND 5 PERCENT BY WEIGHT OF A CORROSIONINHIBITING SALT COMPOUND WHICH HAS A RECEPTOR FUNCTION FOR AND IS CAPABLE OF COUNTER-EFFECTING HYDROGEN HALIDE, SAID CORROSION-INHIBITING COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF DISODIUM BENEZENEPHOSPHONATE, DISODIUM OCTYLPHOSPHONATE, DIPOTASSIUM BENZENEPHOSPHONATE, CALCIUM BENZENEPHOSPHONATE, ZINC BENZENEPHOSPHONATE, AND CALCIUM LAURYLPHOSPHONATE.
Claim 2
Dependent Claim
98 words
A NON-CORROSIVE COMPOSITION COMPRISING POLYETHYLENE PREPARED BY POLYMERIZING ETHYLENE IN THE PRESENCE OF A HALOGEN-CONTAINING CATALYST FORMED BY ADMIXING AN ALUMINUM ALKYL WITH A TITANIUM HALIDE, SAID POLYMETHYLENE CONTAINING HALOGEN-INCLUDING CATALYST RESIDUES AFTER HAVING BEEN POLYMERIZED WHICH CAUSE THE PRESENCE OF HYDROGEN HALIDE IN THE POLYMERIZED MATERIAL, AND BETWEEN ABOUT 0.005 PERCENT AND 5 PERCENT BY WEIGHT OF A CORROSIONINHIBITING SALT COMPOUND WHICH HAS A RECEPTOR FUNCTION FOR AND IS CAPABLE OF COUNTER-EFFECTING HYDROGEN HALIDE, SAID CORROSION-INHIBITING COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF DISODIUM BENEZENEPHOSPHONATE, DISODIUM OCTYLPHOSPHONATE, DIPOTASSIUM BENZENEPHOSPHONATE, CALCIUM BENZENEPHOSPHONATE, ZINC BENZENEPHOSPHONATE, AND CALCIUM LAURYLPHOSPHONATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |