Patent US3850857A successfully refreshed from Google Patents.
US3850857A
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Process for the polymerization of epihalohydrin employing a trialkyl oxonium salt of an hmf6 acid as catalyst
Assignee: Goodrich Corp
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Filing: 1973-08-20
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Granted: 1974-11-26
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Expires: 1993-08-20
Abstract
Abstract 1. A PROCESS FOR THE PREPARATION OF EPIHALOHYDRIN POLYMERS WHICH COMPRISES PRESENCE OF A CATALYTIC POLYMERIZING EPIHALOHYDRIN IN THE OF AN HMF6 ACID WHEREIN M IS AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS, ARSENIC AND ANTIMONY.
Inventors
- 👤 M Dreyfuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:24
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR THE PREPARATION OF EPIHALOHYDRIN POLYMERS WHICH COMPRISES PRESENCE OF A CATALYTIC POLYMERIZING EPIHALOHYDRIN IN THE OF AN HMF6 ACID WHEREIN M IS AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS, ARSENIC AND ANTIMONY.
Claim 2
Dependent Claim
37 words
A PROCESS FOR THE PREPARATION OF EPIHALOHYDRIN POLYMERS WHICH COMPRISES PRESENCE OF A CATALYTIC POLYMERIZING EPIHALOHYDRIN IN THE OF AN HMF6 ACID WHEREIN M IS AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS, ARSENIC AND ANTIMONY.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |