Patent US2734894A successfully refreshed from Google Patents.
US2734894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing z
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
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Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR THE CUTTING OF POLYMERISATION PRODUCTS OF 2:4-DIMETHYLSTYRENE, WHICH COMPRISES INCORPORATING IN A POLYMER OF 2:4-DIMETHYLSTYRENE, 0.1 TO 5% BY WEIGHT ON THE WEIGHT OF THE POLYMER OF A PEROXIDE COMPOUND OF THE FORMULA C(CH3)3-O-O-R, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, HYDROXYL-ALKYL, ACYL, ARALKYL, CYCLO-ALKYL AND ALKYLENE RADICALS, AND THEREAFTER HEATING THE MIXTURE AT A TEMPERATURE IN THE RANGE OF FROM 120* TO 180* C. UNTIL AN INSOLUBLE AND INFUSIBLE 2:4-DIMETHYLSTYRENE POLYMER IS OBTAINED.
Claim 2
Dependent Claim
80 words
A PROCESS FOR THE CUTTING OF POLYMERISATION PRODUCTS OF 2:4-DIMETHYLSTYRENE, WHICH COMPRISES INCORPORATING IN A POLYMER OF 2:4-DIMETHYLSTYRENE, 0.1 TO 5% BY WEIGHT ON THE WEIGHT OF THE POLYMER OF A PEROXIDE COMPOUND OF THE FORMULA C(CH3)3-O-O-R, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, HYDROXYL-ALKYL, ACYL, ARALKYL, CYCLO-ALKYL AND ALKYLENE RADICALS, AND THEREAFTER HEATING THE MIXTURE AT A TEMPERATURE IN THE RANGE OF FROM 120* TO 180* C. UNTIL AN INSOLUBLE AND INFUSIBLE 2:4-DIMETHYLSTYRENE POLYMER IS OBTAINED.
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) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |