Patent US2732371A successfully refreshed from Google Patents.
US2732371A
Expired / Lapsed
US
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Alpha alkyl styrene dimer polymeriza-
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
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Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:35
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN A PROCESS FOR POLYMERIZING A MONOMERIC MATERIAL CONSISTING OF A MONOVINYL AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE MONOVINYL AROMATIC HYDROCARBONS CONTAINING NOT MORE THAN 10 CARBON ATOMS IN THE AROMATIC NUCLEUS AND NUCLEAR HALOGENATED DERIVATIVES THEREOF, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF FROM 0.001 TO 5 PER CENT BY WEIGHT OF THE POLYMERIZABLE MATERIAL, OF AN UNSATURATED DIMER OF A MONOMERIC ALPHA-ALKYL STYRENE HAVING THE FORMULA:
Claim 2
Dependent Claim
76 words
IN A PROCESS FOR POLYMERIZING A MONOMERIC MATERIAL CONSISTING OF A MONOVINYL AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE MONOVINYL AROMATIC HYDROCARBONS CONTAINING NOT MORE THAN 10 CARBON ATOMS IN THE AROMATIC NUCLEUS AND NUCLEAR HALOGENATED DERIVATIVES THEREOF, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF FROM 0.001 TO 5 PER CENT BY WEIGHT OF THE POLYMERIZABLE MATERIAL, OF AN UNSATURATED DIMER OF A MONOMERIC ALPHA-ALKYL STYRENE HAVING THE FORMULA:
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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |