US2706182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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
- 👤 Richard J Bloomfield
- 👤 James H Templeton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/266
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
A PROCESS OF FORMING A SOLID POLYMER OF AN OLEFIN OXIDE CONTAINING NO MORE THAN FOUR CARBON ATOMS PER MOLECULE WHICH COMPRISES MIXING A MONOMERIC MATERIAL COMPOSED OF EPOXIDES AND CONTAINING AT LEAST 50 PERCENT BY WEIGHT OF THE OLEFIN OXIDE WITH A SMALL BUT OPERABLE PROPORATION OF A FERRIC HYDRATE CATALYST SELECTED FROM THE CLASS CONSISTING OF FERRIC HYDROXIDE, FERRIC CHLORIDE HEXAHYDRATE, AND BASIC FERRIC ACETATE, AND HEATING THE MIXTURE AT A TEMPERATURE OF 40* TO 150* C. TO EFFECT POLYMERIZATION.
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) | 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 |