US3378467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering unsaturated monomer by thin film evaporation with a gas and absorption with a solvent
Assignee: Halcon Research and Development Corp
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Filing: 1964-05-20
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Granted: 1968-04-16
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Expires: 1984-05-20
Abstract
No abstract record available.
Inventors
- 👤 Colton John White
- 👤 Jr Joseph E Jewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:38
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR RECOVERING AN UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF MONO-OLEFINS AND DIOLEFINS FROM A SOLUTION POLYMERIZATION REACTOR EFFLUENT COMPRISING MONOMER, INERT ORGANIC SOLVENT, AND POLYMER FORMED FROM SAID MONOMER WHICH COMPRISES PASSING SAID REACTOR EFFLUENT TO A VAPORIZATION ZONE, COUNTERCURRENTLY SWEEPING A THIN FILM OF SAID REACTOR EFFLUENT IN SAID VAPORIZATION ZONE WITH AN INERT GAS SUBSTANTIALLY SATURATED WITH SOLVENT THEREBY REMOVING MONOMER AS VAPOR FROM THE SOLVENT AND POLYMER IN THE FILM BY VAPORIZATION, AND PASSING THE VAPORIZED MONOMER TO AN ABSORPTION ZONE AND ABSORBING THE VAPORIZED MONOMER WITH AN INERT ORGANIC SOLVENT PASSED TO SAID ABSORPTION ZONE.
Claim 2
Dependent Claim
103 words
A PROCESS FOR RECOVERING AN UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF MONO-OLEFINS AND DIOLEFINS FROM A SOLUTION POLYMERIZATION REACTOR EFFLUENT COMPRISING MONOMER, INERT ORGANIC SOLVENT, AND POLYMER FORMED FROM SAID MONOMER WHICH COMPRISES PASSING SAID REACTOR EFFLUENT TO A VAPORIZATION ZONE, COUNTERCURRENTLY SWEEPING A THIN FILM OF SAID REACTOR EFFLUENT IN SAID VAPORIZATION ZONE WITH AN INERT GAS SUBSTANTIALLY SATURATED WITH SOLVENT THEREBY REMOVING MONOMER AS VAPOR FROM THE SOLVENT AND POLYMER IN THE FILM BY VAPORIZATION, AND PASSING THE VAPORIZED MONOMER TO AN ABSORPTION ZONE AND ABSORBING THE VAPORIZED MONOMER WITH AN INERT ORGANIC SOLVENT PASSED TO SAID ABSORPTION ZONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |