US3278458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a polyether using a double metal cyanide complex compound
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1963-02-14
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Granted: 1966-10-11
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Expires: 1983-02-14
Abstract
No abstract record available.
Inventors
- 👤 Belner Robert Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:24
CPC Classifications
B; B60; B60C; B60C11/00; B01; B01J; B01J27/00; B01J27/24; B01J27/26; B60C1/00; B60C1/0016; B60C1/0025; C; C07; C07F; C07F17/00; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
THE METHOD FOR MAKING A POLYETHER WHICH COMPRISES MIXING AT LEAST ONE POLYMERIZABLE ORGANIC CYCLIC OXIDE MONOMER HAVING A RING OF FROM 2 TO 3 CARBON ATOMS ANND ONE OXYGEN ATOM WITH A PARTICULATE CATALYST AND POLYMERIZING SAID MONOMER THROUGH ITS CYCLIC OXIDE GROUP TO FORM A POLYETHER IN ADMIXTURE WITH SAID CATALYST, SAID CATALYST BEING USED IN A MINOR AMOUNT BY WEIGHT SUFFICIENT TO POLYMERIZE SAID MONOMER TO FORM SAID POLYMER AND COMPRISING A DOUBLE METAL CYANIDE COMPLEX COMPOUND WHEREIN ONE OF THE METALS OF SAID COMPLEX COMPOUND IS SELECTED FROM THE GROUP CONSISTING OF ZN(II), FE(II), FE(III), CO(II), NI(II), MO(IV), MO(VI), AL(III), V(IV), V(V), SR(II), W(IV), W(VI), MN(II), AND CR(III) AND MIXTURES THEREOF, AND WHEREIN THE OTHER METAL OF SAID COMPLEX COMPOUND IS A METAL SELECTED FROM THE GROUP CONSISTING OF FE(II), FE(III), CO(II), CO(III), CR(II), CR(III), MN(II), MN(III), V(IV), AND V(V) AND MIXTURES THEREOF.
Claim 2
Independent Claim
147 words
THE METHOD FOR MAKING A POLYETHER WHICH COMPRISES MIXING AT LEAST ONE POLYMERIZABLE ORGANIC CYCLIC OXIDE MONOMER HAVING A RING OF FROM 2 TO 3 CARBON ATOMS ANND ONE OXYGEN ATOM WITH A PARTICULATE CATALYST AND POLYMERIZING SAID MONOMER THROUGH ITS CYCLIC OXIDE GROUP TO FORM A POLYETHER IN ADMIXTURE WITH SAID CATALYST, SAID CATALYST BEING USED IN A MINOR AMOUNT BY WEIGHT SUFFICIENT TO POLYMERIZE SAID MONOMER TO FORM SAID POLYMER AND COMPRISING A DOUBLE METAL CYANIDE COMPLEX COMPOUND WHEREIN ONE OF THE METALS OF SAID COMPLEX COMPOUND IS SELECTED FROM THE GROUP CONSISTING OF ZN(II), FE(II), FE(III), CO(II), NI(II), MO(IV), MO(VI), AL(III), V(IV), V(V), SR(II), W(IV), W(VI), MN(II), AND CR(III) AND MIXTURES THEREOF, AND WHEREIN THE OTHER METAL OF SAID COMPLEX COMPOUND IS A METAL SELECTED FROM THE GROUP CONSISTING OF FE(II), FE(III), CO(II), CO(III), CR(II), CR(III), MN(II), MN(III), V(IV), AND V(V) AND MIXTURES THEREOF.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |