US2904541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous polymerization processes and resulting products
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-12-23
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Granted: 1959-09-15
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Expires: 1973-12-23
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:55
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F20/00; C08F20/02; C08F20/04; C08F20/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD OF CONTINUOUSLY PREPARING HOMOPOLYMERS WHICH COMPRISES CONTINUOUSLY ADDING A POLYERIZATION CATALYST, A NON-POLYMERIZABLE INERT LIQUID AND A MONOMER TO A SLURRY OF A HOMOPOLYMER OF SAID MONOMER IN SOME OF THE SAME INERT LIQUID, CONTINUOUSLY MAINTAINING THE TEMPERATURE OF SAID SLURRY SUFFICIENTLY HIGH TO EFFECT POLYMERIZATION OF SAID MONOMER IN THE SLURRY, THEREBY FORMING ADDITIONAL HOMOPOLYMER FROM SAID MONOMER, AND CONTINUOUSLY REMOVING A MINOR PORTION OF THE SLURRY FROM THE BULK OF THE SLURRY, SAID MONOMER BEING A MEMBER OF THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS, SAID INERT LIQUID BEING A NON-SOLVENT AND SUBSTANTIALLY NON-SWELLING MEDIUM FOR SAID HOMOPOLYMER AND BEING SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS HAVING A BOILING POINT ABOVE 50* C. AND CHLORINATED HYDROCARBONS HAVING A BOILING POINT ABOVE 50* C.
Claim 2
Independent Claim
129 words
A METHOD OF CONTINUOUSLY PREPARING HOMOPOLYMERS WHICH COMPRISES CONTINUOUSLY ADDING A POLYERIZATION CATALYST, A NON-POLYMERIZABLE INERT LIQUID AND A MONOMER TO A SLURRY OF A HOMOPOLYMER OF SAID MONOMER IN SOME OF THE SAME INERT LIQUID, CONTINUOUSLY MAINTAINING THE TEMPERATURE OF SAID SLURRY SUFFICIENTLY HIGH TO EFFECT POLYMERIZATION OF SAID MONOMER IN THE SLURRY, THEREBY FORMING ADDITIONAL HOMOPOLYMER FROM SAID MONOMER, AND CONTINUOUSLY REMOVING A MINOR PORTION OF THE SLURRY FROM THE BULK OF THE SLURRY, SAID MONOMER BEING A MEMBER OF THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS, SAID INERT LIQUID BEING A NON-SOLVENT AND SUBSTANTIALLY NON-SWELLING MEDIUM FOR SAID HOMOPOLYMER AND BEING SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS HAVING A BOILING POINT ABOVE 50* C. AND CHLORINATED HYDROCARBONS HAVING A BOILING POINT ABOVE 50* C.
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |