US2706181A
Expired / Lapsed
US
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Catalysts for the polymerization of olefin oxides
Assignee: Dow Chemical Co
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Filing: 1952-06-05
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Granted: 1955-04-12
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Expires: 1972-06-05
Abstract
No abstract record available.
Inventors
- 👤 Malcolm E Pruitt
- 👤 Joseph M Baggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:56
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/266; B; B01; B01J; B01J27/00; B01J27/06; C07; C07F; C07F15/00; C07F15/02; C07F15/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
A PROCESS FO POLYMERIZING A LOWER OLEFIN OXIDE TO FORM A SOLID POLYMER WHICH COMPRISES MIXING IT WITH A SMALL PROPORTION OF A COMPLEX CATALYST CONDENSATE OF A FERRIC HALIDE AND PROPYLENE OXIDE AND CORRESPONDING TO THE EMPIRICAL FORMULA FEX3. (C3H6O)N IN WHICH X IS A HALOGEN OF ATOMIC NUMBER FROM 17 TO 35 AND N HAS A VALUE FROM 0.5 TO 3. AND HEATING THE MIXTURE AT A TEMPERATURE OF 40* TO 150* C. FOR A TIME SUFFICIENT TO EFFECT POLYMERIZATION.
References Cited (Backward Citations)
US2327053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |