US3060159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of unreacted monomers
Assignee: Monsanto Chemicals Ltd
•
Filing: 1960-05-10
•
Granted: 1962-10-23
•
Expires: 1980-05-10
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Lea
- 👤 Thomas M Veazey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
C; C08; C08F; C08F4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF CONTROLLING THE CARRYOVER OF SULFUR DIOXIDE IN A MONOMER RECOVERY SYSTEM OF A SHORTSTOPPED COPOLYMERIZATION REACTION OF VINYL MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, STYRENE, ACRYLIC ACID,SUBSTITUTED ACRYLIC ACID, METHYLISOPROPENYL KETONE, VINYL CHLORIDE, VINYLIDENE CHLORIDE, VINYL ACETATE, VINYL VINYL LAURATE AND OTHER MONOMER-OLEFINIC ACRYLONITRILE COPOLYMERIZABLE MONOMERS OF A REDOX CATALYST SYSTEM IN WHICH THE ACTIVATOR COMPRISES A WATER SOLUBLE, OXIDIZABLE SULFOXY COMPOUND IN WHICH THE VALENCE OF A SULFUR ATOM DOES NOT EXCEED 4, COMPRISING TREATING THE FILTRATE OF THE SHORTSTOPPED COPOLYMERIZATION REACTION WITH HYDROGEN PEROXIDE.
Claim 2
Independent Claim
91 words
THE METHOD OF CONTROLLING THE CARRYOVER OF SULFUR DIOXIDE IN A MONOMER RECOVERY SYSTEM OF A SHORTSTOPPED COPOLYMERIZATION REACTION OF VINYL MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, STYRENE, ACRYLIC ACID,SUBSTITUTED ACRYLIC ACID, METHYLISOPROPENYL KETONE, VINYL CHLORIDE, VINYLIDENE CHLORIDE, VINYL ACETATE, VINYL VINYL LAURATE AND OTHER MONOMER-OLEFINIC ACRYLONITRILE COPOLYMERIZABLE MONOMERS OF A REDOX CATALYST SYSTEM IN WHICH THE ACTIVATOR COMPRISES A WATER SOLUBLE, OXIDIZABLE SULFOXY COMPOUND IN WHICH THE VALENCE OF A SULFUR ATOM DOES NOT EXCEED 4, COMPRISING TREATING THE FILTRATE OF THE SHORTSTOPPED COPOLYMERIZATION REACTION WITH HYDROGEN PEROXIDE.
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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |