Patent US3352808A successfully refreshed from Google Patents.
US3352808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers of styrene and butadiene onto polyvinyl lactam homopolymers
Assignee: GAF Chemicals Corp
•
Filing: 1963-09-09
•
Granted: 1967-11-14
•
Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 Marvin R Leibowitz
- 👤 Grosser Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:27
CPC Classifications
C; C08; C08F; C08F271/00; C08F271/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE PROCESS OF PRODUCING INTERPOLYMERS OF AN NVINYL LACTAM WITH STYRENE AND BUTADIENE WHICH COMPRISES SUBJECTING A MIXTURE OF STYRENE AND BUTADIENE IN AN AQUEOUS SOLUTION OF A WATER-SOLUBLE HOMOPOLYMER OF AN N-VINYL LACTAM TO POLYMERIZATION CONDITIONS IN THE PRESENCE OF A WATER SOLUBLE EMULSIFYING AGENT AND A WATER SOLUBLE HYDROPEROXIDE POLYMERIZATION CATALYST, THE RATIO OF HOMOPOLYMER OF N-VINYL LACTAM TO STYRENE AND BUTADIENE BEING IN THE RANGE OF 5:95 TO 60:40 BY WEIGHT AND THE RATIO OF STYRENE TO BUTADIENE BEING IN THE RANGE OF 5:95 TO 50:50.
Claim 2
Dependent Claim
89 words
THE PROCESS OF PRODUCING INTERPOLYMERS OF AN NVINYL LACTAM WITH STYRENE AND BUTADIENE WHICH COMPRISES SUBJECTING A MIXTURE OF STYRENE AND BUTADIENE IN AN AQUEOUS SOLUTION OF A WATER-SOLUBLE HOMOPOLYMER OF AN N-VINYL LACTAM TO POLYMERIZATION CONDITIONS IN THE PRESENCE OF A WATER SOLUBLE EMULSIFYING AGENT AND A WATER SOLUBLE HYDROPEROXIDE POLYMERIZATION CATALYST, THE RATIO OF HOMOPOLYMER OF N-VINYL LACTAM TO STYRENE AND BUTADIENE BEING IN THE RANGE OF 5:95 TO 60:40 BY WEIGHT AND THE RATIO OF STYRENE TO BUTADIENE BEING IN THE RANGE OF 5:95 TO 50:50.
References Cited (Backward Citations)
US2890199A
Cited
US2824055A
Cited
GB819049A
Cited
US2922768A
Cited
US3004057A
Cited
US3244657A
Cited
US3244658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |