Patent US3342883A successfully refreshed from Google Patents.
US3342883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of isobutylene and omega-monohalo-1-alkenes
Assignee: Chevron USA Inc
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Filing: 1964-10-07
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Granted: 1967-09-19
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Expires: 1984-10-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas V Liston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:04
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/275; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
A PROCESS FOR MAKING LOW MOLECULAR WEIGHT COPOLYMERS OF AN W-MONOHALO-1-ALKENE HAVING FROM COMPRISES ADDING AN W-MONOHALO-1-ALKENE HAVING FROM 5 TO 12 CARBON ATOMS WHEREIN SAID HALOGEN IS OF ATOMIC NUMBER 17 TO 35 AND ISOBUTYLENE, THE MOL RATIO OF ISOBUTYLENE TO W-MONOHALO-1-ALKENE BEING FROM ABOUT 10200:1, TO A CATALYST SYSTEM COMPRISING AN ALUMINUM HALIDE WHEREIN SAID HALIDE IS OF ATOMIC NUMBER 17 TO 35 AND A CO-CATALYST SELECTED FROM THE GROUP CONSISTING OF HX,RX AND H2O WHEREIN X REPRESENTS A HALOGEN OF ATOMIC NUMBER 17 TO 35 AND R REPRESENTS LOWER ALKYL, IN THE PRESENCE OF AN INERT SOLVENT, AND RECOVERING THEREFROM A COPOLYMER OF FROM ABOUT 0.5 TO 10 MOL PERCENT OF W-MONOHALO-1-ALKENE AND FROM ABOUT 90 TO 99.5 MOL PERCENT OF ISOBUTYLENE.
Claim 2
Dependent Claim
125 words
A PROCESS FOR MAKING LOW MOLECULAR WEIGHT COPOLYMERS OF AN W-MONOHALO-1-ALKENE HAVING FROM COMPRISES ADDING AN W-MONOHALO-1-ALKENE HAVING FROM 5 TO 12 CARBON ATOMS WHEREIN SAID HALOGEN IS OF ATOMIC NUMBER 17 TO 35 AND ISOBUTYLENE, THE MOL RATIO OF ISOBUTYLENE TO W-MONOHALO-1-ALKENE BEING FROM ABOUT 10200:1, TO A CATALYST SYSTEM COMPRISING AN ALUMINUM HALIDE WHEREIN SAID HALIDE IS OF ATOMIC NUMBER 17 TO 35 AND A CO-CATALYST SELECTED FROM THE GROUP CONSISTING OF HX,RX AND H2O WHEREIN X REPRESENTS A HALOGEN OF ATOMIC NUMBER 17 TO 35 AND R REPRESENTS LOWER ALKYL, IN THE PRESENCE OF AN INERT SOLVENT, AND RECOVERING THEREFROM A COPOLYMER OF FROM ABOUT 0.5 TO 10 MOL PERCENT OF W-MONOHALO-1-ALKENE AND FROM ABOUT 90 TO 99.5 MOL PERCENT OF ISOBUTYLENE.
Claim 3
Dependent Claim
9 words
THE COPOLYMER PREPARED BY THE PROCESS OF CLAIM 1.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |