US3228910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing solid poly-1, 4-phenylene ethers
Assignee: EIDP Inc
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Filing: 1960-09-22
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Granted: 1966-01-11
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Expires: 1980-09-22
Abstract
No abstract record available.
Inventors
- 👤 Stamatoff Gelu Stoeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:11
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PORDUCTING SOLID POLY-1, 4-PHENYLENE ETHER WHICH COMPRISES HEATING, IN AN INERT OXYGEN-FREE ATMOSPHERE, SODIUM P-BROMOPHENOLATE WITH A COMPLEX OF A CUPROUS SLT AND A MONOMERIC ORGANIC COMPOUND CONTAINING TERTIARY NITROGEN ATOMS AT 140* TO 250*C. IN THE PRESENCE OF AN INERT ORGANIC LIQUID MEDIUM IN WHICH THE SODIUM P-BROMOPHENOLATE IS SOLUBLE, AND SEPARATING SOLID POLY-1,4-PHENYLENE ETHER FROM THE RESULTING MIXTURE.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PORDUCTING SOLID POLY-1, 4-PHENYLENE ETHER WHICH COMPRISES HEATING, IN AN INERT OXYGEN-FREE ATMOSPHERE, SODIUM P-BROMOPHENOLATE WITH A COMPLEX OF A CUPROUS SLT AND A MONOMERIC ORGANIC COMPOUND CONTAINING TERTIARY NITROGEN ATOMS AT 140* TO 250*C. IN THE PRESENCE OF AN INERT ORGANIC LIQUID MEDIUM IN WHICH THE SODIUM P-BROMOPHENOLATE IS SOLUBLE, AND SEPARATING SOLID POLY-1,4-PHENYLENE ETHER FROM THE RESULTING MIXTURE.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |