Patent US4369364A successfully refreshed from Google Patents.
Patent US2940960A successfully refreshed from Google Patents.
US2940960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering polymers
Assignee: —
•
Filing: —
•
Granted: 1960-06-14
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Expires: 1977-06-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:44
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08F; C08F6/00; C08F6/001; C08F6/003; C08F6/06; C08F6/12; C08J11/00; C08J11/04; C08J11/06; C08J11/08; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A PROCESS FOR CONTINUOUSLY RECOVERING ISOOLEFINCONTAINING POLYMERIC MATERIALS BY THE USE OF SOLVENTS, SAID POLYMERIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF C4 TO C8 ISOOLEFINS, COPOLYMERS OF C4 TO 8 ISOOLEFINS WITH C4 TO C14 MULTIOLEFINS AND COPOLYMERS OF C4 TO C8 ISOOLEFINS WITH A VINYL AROMATIC HYDROCARBON, THE COMBINATION WHICH COMPRISES CONTACTILNG A SLURRY OF SAID POLYMER IN A C1 TO C3 ALKYL HALIDE NON-SOLVENT LIQUID DILUENT WITH A C5 TO C10 INERT HYDROCARBON IN VAPOR FORM, WHICH, WHEN CONDENSED IN LIQUID FORM, IS A SOLVENT FOR SAID POLYMERIC MATERIAL, TO VOLATILIZE THE NON-SOLVENT DILUENT AND DISSOLVE THE POLYMER IN THE C5 TO C10 HYDROCARBON SOLVENT, AND SUBSEQUENTLY VAPORIZING SAID HYDROCARBON SOLVENT.
Claim 2
Dependent Claim
36 words
A PROCESS ACCORDING TO CLAIM 6 IN WHICH THE C5 TO C10 HYDROCARBON SOLVENT ILS VAPORIZED BY CONTACT WITH A VAPOR OF A LIQUID HAVING A BOILING POINT HIGHER THAN SAID C5 TO C10 HYDROCARBON SOLVENT.
References Cited (Backward Citations)
US2843761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |