US2870113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing finely divided solid 1-olefin polymer
Assignee: Phillips Petroleum Co
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Filing: 1955-04-06
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Granted: 1959-01-20
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Expires: 1975-04-06
Abstract
No abstract record available.
Inventors
- 👤 Rufus V Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:18
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S524/00; Y10S524/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOD FOR PRODUCING A FINELY DIVIDED SOLID POLYMER OF AN ALIPHATIC 1-OLEFIN HAVING UP TO AND INCLUDING 8 CARBON ATOMS PER MOLECULE WHICH COMPRISES, DISSOLVING SAID POLYMER IN A NORMALLY LIQUID SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE, ALKYL-SUBSTITUTED BENZENES, NAPHTHENES, HYDROGENATED NAPHTHALENES, PARAFFINS, CARBON TETRACHLORIDE AND TETRACHLOROETHANE, COOLING THE RESULTING SOLUTION TO PRODUCE A SOLID PRECIPITATE OF SAID POLYMER IN SAID SOLVENT, SEPARATING SAID PRECIPIATE FROM SAID SOLVENT TO PRODUCE A POLYMER SWOLLEN WITH SAID SOLVENT, PASSING SAID SOLVENT-SWOLLEN POLYMER INTO A DISPERSING MEDIUM SELECTED FROM THE GROUP CONSISTING OF ALCHOLS, KETONES, AND ETHERS, SAID DISPERSING MEDIUM BEING A NORMALLY LIQUID ORGANIC MATERIAL WHICH IS MISCIBLE WITH SAID SOLVENT BUT IN WHICH SAID POLYMER IS SUBSTANTIALLY INSOLUBLE, AND COMMINUTING SAID POLYMER IN THE PRESENCE OF SAID DISPERSING MEDIUM.
Claim 2
Independent Claim
131 words
A METHOD FOR PRODUCING A FINELY DIVIDED SOLID POLYMER OF AN ALIPHATIC 1-OLEFIN HAVING UP TO AND INCLUDING 8 CARBON ATOMS PER MOLECULE WHICH COMPRISES, DISSOLVING SAID POLYMER IN A NORMALLY LIQUID SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE, ALKYL-SUBSTITUTED BENZENES, NAPHTHENES, HYDROGENATED NAPHTHALENES, PARAFFINS, CARBON TETRACHLORIDE AND TETRACHLOROETHANE, COOLING THE RESULTING SOLUTION TO PRODUCE A SOLID PRECIPITATE OF SAID POLYMER IN SAID SOLVENT, SEPARATING SAID PRECIPIATE FROM SAID SOLVENT TO PRODUCE A POLYMER SWOLLEN WITH SAID SOLVENT, PASSING SAID SOLVENT-SWOLLEN POLYMER INTO A DISPERSING MEDIUM SELECTED FROM THE GROUP CONSISTING OF ALCHOLS, KETONES, AND ETHERS, SAID DISPERSING MEDIUM BEING A NORMALLY LIQUID ORGANIC MATERIAL WHICH IS MISCIBLE WITH SAID SOLVENT BUT IN WHICH SAID POLYMER IS SUBSTANTIALLY INSOLUBLE, AND COMMINUTING SAID POLYMER IN THE PRESENCE OF SAID DISPERSING MEDIUM.
References Cited (Backward Citations)
US2313144A
Cited
US2561951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |