US2610962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene copolymer mixtures
Assignee: Dow Chemical Co
•
Filing: 1946-12-03
•
Granted: 1952-09-16
•
Expires: 1966-12-03
Abstract
No abstract record available.
Inventors
- 👤 William H Smyers
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:06
CPC Classifications
C; C08; C08F; C08F257/00; C08F257/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
PROCESS WHICH COMPRISES DISSOLVING IN 70 TO 95 PARTS BY WEIGHT OF STYRENE, 5 TO 30 PARTS BY WEIGHT OF HIGH MOLECULAR WEIGHT STYRENE-ISOBUTYLENE COPOLYMER HAVING 60 TO 70% COMBINED STYRENE AND AN INTRINSIC VISCOSITY OF 0.6 TO 0.95, ADDING A POLYMERIZATION-PROMOTING AMOUNT OF BENZOYL PEROXIDE, AND POLYMERIZING SAID MONOMERIC STYRENE IN SITU AT 20 TO 150* C.
Claim 2
Dependent Claim
58 words
PROCESS WHICH COMPRISES DISSOLVING IN 70 TO 95 PARTS BY WEIGHT OF STYRENE, 5 TO 30 PARTS BY WEIGHT OF HIGH MOLECULAR WEIGHT STYRENE-ISOBUTYLENE COPOLYMER HAVING 60 TO 70% COMBINED STYRENE AND AN INTRINSIC VISCOSITY OF 0.6 TO 0.95, ADDING A POLYMERIZATION-PROMOTING AMOUNT OF BENZOYL PEROXIDE, AND POLYMERIZING SAID MONOMERIC STYRENE IN SITU AT 20 TO 150* C.
References Cited (Backward Citations)
US2213423A
Cited
US2274749A
Cited
US2282002A
Cited
US2320924A
Cited
US2491525A
Cited
GB610422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |