Patent US2912401A successfully refreshed from Google Patents.
US2912401A
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US
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Stripping solvent from isobutylene-isoprene copolymer latices
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1956-05-08
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Granted: 1959-11-10
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Expires: 1976-05-08
Abstract
No abstract record available.
Inventors
- 👤 Aldridge Clyde Lee
- 👤 Hunter Edward Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:19
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; C08J2321/00; Y; Y10; Y10S; Y10S159/00; Y10S159/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
PROCESS FOR PREPARING A VULCANIZED ELASTIC COPOLYMER OF ISOBUTYLENE AND A MINOR AMOUNT OF ISOPRENE LATICES WHICH COMPRISES EMULSIFYING 1 LITER OF A SOLUTION OF SAID COPOLYMER IN HEXANE WITH ABOUT 0.4 TO 1 LITER OF A MIXTURE CONSISTING OF 2 TO 5 VOLUMES OF WATER AND 1 VOLUME OF METHANOL, DISTILLING THE RESULTING EMULSION AT A TEMPERATURE LOWER THAN THE BOILING POINT OF HEXANE UNTIL NO MORE HEXANE-METHANOL AZEOTROPE IS REMOVED AND RECOVERING A COPOLYMER LATEX AND A DISTILLATE CONSISTING OF A HEXANE-METHANOL AZEOTROPE.
Claim 2
Dependent Claim
85 words
PROCESS FOR PREPARING A VULCANIZED ELASTIC COPOLYMER OF ISOBUTYLENE AND A MINOR AMOUNT OF ISOPRENE LATICES WHICH COMPRISES EMULSIFYING 1 LITER OF A SOLUTION OF SAID COPOLYMER IN HEXANE WITH ABOUT 0.4 TO 1 LITER OF A MIXTURE CONSISTING OF 2 TO 5 VOLUMES OF WATER AND 1 VOLUME OF METHANOL, DISTILLING THE RESULTING EMULSION AT A TEMPERATURE LOWER THAN THE BOILING POINT OF HEXANE UNTIL NO MORE HEXANE-METHANOL AZEOTROPE IS REMOVED AND RECOVERING A COPOLYMER LATEX AND A DISTILLATE CONSISTING OF A HEXANE-METHANOL AZEOTROPE.
References Cited (Backward Citations)
US2296427A
Cited
US2799662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |