Patent US2933459A successfully refreshed from Google Patents.
US2933459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stannous salts as catalysts for the polymerization of olefin oxides
Assignee: Dow Chemical Co
•
Filing: 1958-07-22
•
Granted: 1960-04-19
•
Expires: 1978-07-22
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Gurgiolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:10
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR THE POLYMERIZATION OF A LOWER OLEFIN OXIDE CONTAINING NOT MORE THAN 4 CARBON ATOMS IN ITS MOLECULE TO FORM SOLID POLYMERIC MATERIALS, WHICH COMPRISES MIXING THE OLEFIN OXIDE WITH FROM 1 TO 6 WEIGHT PERCENT OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF STANNOUS SALTS OF ALIPHATIC MONO- AND POLYCARBOXYLIC ACIDS HAVING FROM 2 TO 30 CARBON ATOMS AND AROMATIC MONO- AND DICARBOXYLIC ACIDS HAVING UP TO 3 AROMATIC RINGS, HEATING THE RESULTING MIXTURE TO A TEMPERATURE OF FROM 30* TO 150*C. FOR A PERIOD OF TIME SUFFICIENT TO POLYMERIZE THE OLEFIN OXIDE, AND SEPARATING THE SOLID POLYMERIC MATERIAL FROM THE REACTION MASS.
Claim 2
Dependent Claim
107 words
A PROCESS FOR THE POLYMERIZATION OF A LOWER OLEFIN OXIDE CONTAINING NOT MORE THAN 4 CARBON ATOMS IN ITS MOLECULE TO FORM SOLID POLYMERIC MATERIALS, WHICH COMPRISES MIXING THE OLEFIN OXIDE WITH FROM 1 TO 6 WEIGHT PERCENT OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF STANNOUS SALTS OF ALIPHATIC MONO- AND POLYCARBOXYLIC ACIDS HAVING FROM 2 TO 30 CARBON ATOMS AND AROMATIC MONO- AND DICARBOXYLIC ACIDS HAVING UP TO 3 AROMATIC RINGS, HEATING THE RESULTING MIXTURE TO A TEMPERATURE OF FROM 30* TO 150*C. FOR A PERIOD OF TIME SUFFICIENT TO POLYMERIZE THE OLEFIN OXIDE, AND SEPARATING THE SOLID POLYMERIC MATERIAL FROM THE REACTION MASS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |