US3356619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of polymerizing tetrahydrofuran
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1964-08-31
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Granted: 1967-12-05
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Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Kuntz Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:57
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD FOR POLYMERIZING TETRAHYDROFURAN WHICH COMPRISES COSTACTING SAID TETRAHYDROFURAN WITH A CATALYTIC AMOUNT OF A CATALYST SYSTEM COMPOSED OF: (A) AN ARYLMETHYL CARBONIUM ION SALT OF THE FORMULA ARXCHYMXZ WHERE AR IS SELECTED FROM THE CLASS CONSISTING OF PHENYL GROUPS, AND NAPHTHYL GROUPS; M IS SELECTED FROM THE CLASS OF ANTIMONY, TIN, ALUMINUM, BORON, ZINC, IRON, TITANIUM, ZIRCONIUM AND VANADIUM; X IS SELCTED FROM THE CLASS OF CHLORINE, BROMINE, AND FLUORINE; X IS AN INTEGER OF FROM 2 TO 6; X PLUS Y IS EQUAL TO 3; AND Z EQUALS 1+ THE HIGHEST VALENCE OF M; AND, (B) AN EPOXIDE OF THE FORMULA
Claim 2
Independent Claim
104 words
A METHOD FOR POLYMERIZING TETRAHYDROFURAN WHICH COMPRISES COSTACTING SAID TETRAHYDROFURAN WITH A CATALYTIC AMOUNT OF A CATALYST SYSTEM COMPOSED OF: (A) AN ARYLMETHYL CARBONIUM ION SALT OF THE FORMULA ARXCHYMXZ WHERE AR IS SELECTED FROM THE CLASS CONSISTING OF PHENYL GROUPS, AND NAPHTHYL GROUPS; M IS SELECTED FROM THE CLASS OF ANTIMONY, TIN, ALUMINUM, BORON, ZINC, IRON, TITANIUM, ZIRCONIUM AND VANADIUM; X IS SELCTED FROM THE CLASS OF CHLORINE, BROMINE, AND FLUORINE; X IS AN INTEGER OF FROM 2 TO 6; X PLUS Y IS EQUAL TO 3; AND Z EQUALS 1+ THE HIGHEST VALENCE OF M; AND, (B) AN EPOXIDE OF THE FORMULA
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |