Patent US3244660A successfully refreshed from Google Patents.
US3244660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inert solvent recovery in solution polymerization
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1960-12-20
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Granted: 1966-04-05
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Expires: 1980-12-20
Abstract
No abstract record available.
Inventors
- 👤 Robert J Herold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:10
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/06; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
228 words
A METHOD WHICH COMPRISES ADDING TO A COMPOSITION COMPRISING A SOLUTION OF AN ESSENTIALLY PURE INERT LIQUID ORGANIC SOLVENT OF AT LEAST 4 CARBON ATOMS AND A POLYMERIC MATERIAL OBTAINED BY POLYMERIZING AT A TEMPERATURE OF FROM ABOUT 0* TO 150*C. A MONOMERIC MATERIAL WITH AN IONIC CATALYST IN SAID SOLVENT WHICH IS A SOLVENT FOR SAID POLYMERIC MATERIAL, A SECOND NAMED LIQUID ORGANIC SOLVENT FOR SAID POLYMERIC MATERIAL AND HAVING A BOILING POINT OF AT LEAST ABOUT 40 DEGREES CENTIGRADE HIGHER THAN THE BOILING POINT OF SAID FIRST NAMED SOLVENT, HEATING THE RESULTING SOLUTION OF SAID SOLVENTS AND POLYMERIC MATERIAL AT A TEMPERATURE SUFFICIENT TO EVAPORATE SUBSTANTIALLY ALL OF SAID FIRST NAMED SOLVENT FROM SAID SOLUTION AND BELOW THE BOILING POINT OF SAID SECOND NAMED SOLVENT, WITHDRAWING THE RESULTING VAPORIZED FIRST NAMED SOLVENT AND COOLING AND CONDENSING SAID FIRST NAMED SOLVENT FOR MIXING WITH FRESTH POLYMERIZABLE MONOMERIC MATERIAL AND IONIC CATALYST, SAID MONOMERIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF (A) AT LEAST ONE DIENE HAVING FROM 4 TO 8 CARBON ATOMS AND AFFORDING 1,4 ADDITION, (B) AT LEAST ONE STYRENE, (C) MIXTURES OF (A) AND !B), (D) MIXTURES OF STRAIGHT-CHAIN ALIPHATIC MONO OLEFINS HAVING FROM 2 TO 8 CARBON ATOMS, AND (E) AT LEAST ONE ORGANIC CYCLIC OXIDE HAVING AT LEAST ONE RING CONSISTING OF ONE OXYGEN ATOM AND FROM 2 TO 4 CARBON ATOMS.
Claim 2
Independent Claim
228 words
A METHOD WHICH COMPRISES ADDING TO A COMPOSITION COMPRISING A SOLUTION OF AN ESSENTIALLY PURE INERT LIQUID ORGANIC SOLVENT OF AT LEAST 4 CARBON ATOMS AND A POLYMERIC MATERIAL OBTAINED BY POLYMERIZING AT A TEMPERATURE OF FROM ABOUT 0* TO 150*C. A MONOMERIC MATERIAL WITH AN IONIC CATALYST IN SAID SOLVENT WHICH IS A SOLVENT FOR SAID POLYMERIC MATERIAL, A SECOND NAMED LIQUID ORGANIC SOLVENT FOR SAID POLYMERIC MATERIAL AND HAVING A BOILING POINT OF AT LEAST ABOUT 40 DEGREES CENTIGRADE HIGHER THAN THE BOILING POINT OF SAID FIRST NAMED SOLVENT, HEATING THE RESULTING SOLUTION OF SAID SOLVENTS AND POLYMERIC MATERIAL AT A TEMPERATURE SUFFICIENT TO EVAPORATE SUBSTANTIALLY ALL OF SAID FIRST NAMED SOLVENT FROM SAID SOLUTION AND BELOW THE BOILING POINT OF SAID SECOND NAMED SOLVENT, WITHDRAWING THE RESULTING VAPORIZED FIRST NAMED SOLVENT AND COOLING AND CONDENSING SAID FIRST NAMED SOLVENT FOR MIXING WITH FRESTH POLYMERIZABLE MONOMERIC MATERIAL AND IONIC CATALYST, SAID MONOMERIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF (A) AT LEAST ONE DIENE HAVING FROM 4 TO 8 CARBON ATOMS AND AFFORDING 1,4 ADDITION, (B) AT LEAST ONE STYRENE, (C) MIXTURES OF (A) AND !B), (D) MIXTURES OF STRAIGHT-CHAIN ALIPHATIC MONO OLEFINS HAVING FROM 2 TO 8 CARBON ATOMS, AND (E) AT LEAST ONE ORGANIC CYCLIC OXIDE HAVING AT LEAST ONE RING CONSISTING OF ONE OXYGEN ATOM AND FROM 2 TO 4 CARBON ATOMS.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |