US2521022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic hydrocarbon resins
Assignee: Interchemical Corp
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Filing: 1946-05-31
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Granted: 1950-09-05
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Expires: 1966-05-31
Abstract
No abstract record available.
Inventors
- 👤 Charles S Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:33
CPC Classifications
C; C08; C08F; C08F240/00; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A THERMOPLASTIC RESIN HAVING A MELTING POINT OF 70* TO 200*C. AN AN IODINE NUMBER OF 200 TO 240, OBTAINED BY POLYMERIZING A STARTING MATERIAL CONSISTING OF THE LOW MOLECULAR WEIGHT HEAT POLYMERS RESULTING FROM THE SEPARATION BY DISTILLATION OF THE MAJOR PROPORTION OF THE UNPOLYMERIZED CONSTITUENTS FROM A HEAT-DIMERIZED UNSATURATED C5 HYDROCARBON FRACTION CONSISTING PRINCIPALLY OF PENTENES, ISOPRENE, PIPERYLENE, AND CYCLOPENTADIENE, THE DIOLEFINIC CONSTITUENTS OF SUCH FRACTION COMPRISING THE MAJOR PROPORTION THEREOF, THE POLYMERIZATION BEING CARRIED OUT AT A TEMPERATURE OF ABOVE 150*C. IN THE PRESENCE OF BORON TRIFLUORIDE CATALYST.
Claim 2
Dependent Claim
91 words
A THERMOPLASTIC RESIN HAVING A MELTING POINT OF 70* TO 200*C. AN AN IODINE NUMBER OF 200 TO 240, OBTAINED BY POLYMERIZING A STARTING MATERIAL CONSISTING OF THE LOW MOLECULAR WEIGHT HEAT POLYMERS RESULTING FROM THE SEPARATION BY DISTILLATION OF THE MAJOR PROPORTION OF THE UNPOLYMERIZED CONSTITUENTS FROM A HEAT-DIMERIZED UNSATURATED C5 HYDROCARBON FRACTION CONSISTING PRINCIPALLY OF PENTENES, ISOPRENE, PIPERYLENE, AND CYCLOPENTADIENE, THE DIOLEFINIC CONSTITUENTS OF SUCH FRACTION COMPRISING THE MAJOR PROPORTION THEREOF, THE POLYMERIZATION BEING CARRIED OUT AT A TEMPERATURE OF ABOVE 150*C. IN THE PRESENCE OF BORON TRIFLUORIDE CATALYST.
References Cited (Backward Citations)
US2067073A
Cited
US2352980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |