US2600782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of dimethylstyrenes and vinyl cyclic compounds
Assignee: Wyeth Holdings LLC
•
Filing: 1948-07-20
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Granted: 1952-06-17
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Expires: 1968-07-20
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:44
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12; C08F212/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A SOLUBLE THERMOPLASTIC, SOLID COPOLYMER OF (1) A MATERIAL SELECTED FROM THE GROUP CONSISTING OF 2,4-DIMETHYL STYRENE,2,5-DIMETHYL STYRENE, AND 3,4-DIMETHYL STYRENE AND (2) A DIFFERENT MATERIAL SELECTED FROM THE GROUP CONSISTING OF STYRENE, 2,4-DIMETHYL STYRENE, 2,5-DIMETHYL STYRENE, 3,4-DIMETHYL STYRENE, A,P-DIMETHYL STYRENE, A-METHYL STYRENE, AND 2,5-DICHLOROSTYRENE EACH OF SAID MATERIALS BEING PRESENT IN AN AMOUNT EQUIVALENT TO AT LEAST 10% OF THE TOTAL. WEIGHT OF SAID COPOLYMER, THE DIMETHYL STYRENES OF(1) HAVING A MELTING POINT RANGE OF NO MORE THAN 3* C. AND AN OPTICAL EXALTATION OF AT LEAST 1, AND SAID COPOLYMER HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.1.
Claim 2
Dependent Claim
100 words
A SOLUBLE THERMOPLASTIC, SOLID COPOLYMER OF (1) A MATERIAL SELECTED FROM THE GROUP CONSISTING OF 2,4-DIMETHYL STYRENE,2,5-DIMETHYL STYRENE, AND 3,4-DIMETHYL STYRENE AND (2) A DIFFERENT MATERIAL SELECTED FROM THE GROUP CONSISTING OF STYRENE, 2,4-DIMETHYL STYRENE, 2,5-DIMETHYL STYRENE, 3,4-DIMETHYL STYRENE, A,P-DIMETHYL STYRENE, A-METHYL STYRENE, AND 2,5-DICHLOROSTYRENE EACH OF SAID MATERIALS BEING PRESENT IN AN AMOUNT EQUIVALENT TO AT LEAST 10% OF THE TOTAL. WEIGHT OF SAID COPOLYMER, THE DIMETHYL STYRENES OF(1) HAVING A MELTING POINT RANGE OF NO MORE THAN 3* C. AND AN OPTICAL EXALTATION OF AT LEAST 1, AND SAID COPOLYMER HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.1.
References Cited (Backward Citations)
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Cited
US1683402A
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US2269810A
Cited
US2255729A
Cited
US2366007A
Cited
US2471785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |