US3236784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of cyclic ethers by diazonium salts of perchloric or perfluorocarboxylic acids
Assignee: Hoechst AG
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Filing: 1962-05-22
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Granted: 1966-02-22
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Expires: 1982-05-22
Abstract
No abstract record available.
Inventors
- 👤 Fischer Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:50
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/02; C08F; C08F4/00; C08F4/04; C08G2/06; C08G2/10; C08G2/18; C08G2/22; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/105; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2654
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD WHICH COMPRISES POLYMERIZING A MEMBER SELECTED FROM THE GROUP CONSISTING OF CYCLIC ETHER AND MIXTURES OF CYCLIC ETHERS IN THE PRESENCE OF 0.001 TO 5% BY WEIGTH OF A DECOMPOSABLE DIAZONIUM SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF PERCHLORIC ACID AND PERFLUOROCARBOXYLIC ACIDS HAVING 2 TO 10 CARBON ATOMS, THE DIAZONIUM MOIETY OF SAID SALT HAVING FROM ONE TO TWO PHENYL GROUPS AND BEING SUBSTITUTED BY FROM ONE TO THREE SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF NITRO, LOWER ALKYL, LOWER ALKOXY AND COMBINATIONS THEREOF.
Claim 2
Independent Claim
90 words
A METHOD WHICH COMPRISES POLYMERIZING A MEMBER SELECTED FROM THE GROUP CONSISTING OF CYCLIC ETHER AND MIXTURES OF CYCLIC ETHERS IN THE PRESENCE OF 0.001 TO 5% BY WEIGTH OF A DECOMPOSABLE DIAZONIUM SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF PERCHLORIC ACID AND PERFLUOROCARBOXYLIC ACIDS HAVING 2 TO 10 CARBON ATOMS, THE DIAZONIUM MOIETY OF SAID SALT HAVING FROM ONE TO TWO PHENYL GROUPS AND BEING SUBSTITUTED BY FROM ONE TO THREE SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF NITRO, LOWER ALKYL, LOWER ALKOXY AND COMBINATIONS THEREOF.
References Cited (Backward Citations)
US2110499A
Cited
US2691038A
Cited
FR1243668A
Cited
US2989511A
Cited
DE1124703B
Cited
FR1263162A
Cited
US3122525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |