US2716137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic condensation of alpha, beta alkylene oxides
Assignee: Wyandotte Chemicals Corp
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Filing: 1952-07-05
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Granted: 1955-08-23
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Expires: 1972-07-05
Abstract
No abstract record available.
Inventors
- 👤 John T Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:47
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/02; C07C41/03; C08; C08G; C08G65/00; C08G65/02; C08G65/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE METHOD OF PREPARING OXYALKYLENE COMPOUNDS, WHICH COMPRISES INTIMATELY CONTACTING AN A,B ALKYLENE OXIDE WITH AN ACTIVE HYDROGEN COMPOUND IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF BENZYLTRIALKYLAMMONIUM HYDROXIDES AND BENZYLTRIALKYLAMMONIUM ALKOXIDES HAVING THE FORMULA:
Claim 2
Independent Claim
39 words
THE METHOD OF PREPARING OXYALKYLENE COMPOUNDS, WHICH COMPRISES INTIMATELY CONTACTING AN A,B ALKYLENE OXIDE WITH AN ACTIVE HYDROGEN COMPOUND IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF BENZYLTRIALKYLAMMONIUM HYDROXIDES AND BENZYLTRIALKYLAMMONIUM ALKOXIDES HAVING THE FORMULA:
References Cited (Backward Citations)
US2053708A
Cited
GB610505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |