US2964512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent-
Assignee: —
•
Filing: —
•
Granted: 1960-12-13
•
Expires: 1977-12-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:06
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/001; C08F6/003; C08L; C08L23/00; C08J; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S159/00; Y10S159/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR RECOVERING A NORMALLY SOLID POLYMER OF AN ALIPHATIC 1-OLEFIN HYDROCARBON HAVING FROM 2 TO 8 CARBON ATOMS PER MOLECULE AND NO CHAIN BRANCHING NEARER THE DOUBLE BOND THAN THE 4-POSITION FROM SOLUTION IN A LIQUID HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF PARAFFINS HAVING FROM 3 TO 12 CARBON ATOMS PER MOLECULE AND NAPHTHENES HAVING FROM 5 TO 6 CARBON ATOMS IN A NAPHTHENIC RING, WHICH PROCESS COMPRISES COOLING SAID SOLUTION BY VAPORIZING SAID HYDROCARBON BY CONTROLLED REDUCTION OF PRESSURE WHEREBY THE UNVAPORIZED SOLUTION IS COOLED AT A RATE WITHIN THE RANGE OF 1 TO 20*F. PER MINUTE AND THE SOLID POLYMER IS PRECIPITATED, DISPERSING THE THUS PRECIPITATED POLYMER, TOGETHER WITH SUPERNATANT HYDROCARBON, INTO WATER, AND VAPORIZING SAID HYDROCARBON TOGETHER WITH WATER BY STEAM DISTILLATION, AND PRODUCING A DISPERSION OF SOLID POLYMER IN WATER.
Claim 2
Dependent Claim
137 words
A PROCESS FOR RECOVERING A NORMALLY SOLID POLYMER OF AN ALIPHATIC 1-OLEFIN HYDROCARBON HAVING FROM 2 TO 8 CARBON ATOMS PER MOLECULE AND NO CHAIN BRANCHING NEARER THE DOUBLE BOND THAN THE 4-POSITION FROM SOLUTION IN A LIQUID HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF PARAFFINS HAVING FROM 3 TO 12 CARBON ATOMS PER MOLECULE AND NAPHTHENES HAVING FROM 5 TO 6 CARBON ATOMS IN A NAPHTHENIC RING, WHICH PROCESS COMPRISES COOLING SAID SOLUTION BY VAPORIZING SAID HYDROCARBON BY CONTROLLED REDUCTION OF PRESSURE WHEREBY THE UNVAPORIZED SOLUTION IS COOLED AT A RATE WITHIN THE RANGE OF 1 TO 20*F. PER MINUTE AND THE SOLID POLYMER IS PRECIPITATED, DISPERSING THE THUS PRECIPITATED POLYMER, TOGETHER WITH SUPERNATANT HYDROCARBON, INTO WATER, AND VAPORIZING SAID HYDROCARBON TOGETHER WITH WATER BY STEAM DISTILLATION, AND PRODUCING A DISPERSION OF SOLID POLYMER IN WATER.
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |