Patent US3000851A successfully refreshed from Google Patents.
US3000851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of monovinyl aromatic copolymers having improved heat resistance
Assignee: Dow Chemical Co
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Filing: 1957-10-14
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Granted: 1961-09-19
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Expires: 1977-10-14
Abstract
No abstract record available.
Inventors
- 👤 Jr William K Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:05
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A THERMOPLASTIC COMPOSITION COMPRISING A HOMOGENEOUS BLEND OF (1) A COPOLYMER PREPARED FROM A MONOMERIC MIXTURE CONSISTING ESSENTIALLY OF A MONOVINYL AROMATIC MONOMER OF THE BENZENE SERIES TOGETHER WITH FROM ABOUT 0.5 TO ABOUT 30 PERCENT BY WEIGHT OF A COMONOMERIC MONOETHYLENICALLY UNSATURATED CARBOXYLIC ACID AND (2) FROM 0.25 TO ABOUT 2.0 PERCENT OF THE WEIGHT OF SAID COPOLYMER OF AN ADDITIVE COMPOUND CONTAINING AT LEAST TWO SUBSTITUENT GROUPS CAPABLE OF HYDROGEN BONDING WITH THE PENDANT CARBOXYL GROUPS OF SAID COPOLYMER AND WHICH CONTAINS NO GROUPS WHICH REACT WITH CARBOXYL GROUPS OF SAID COPOLYMER TO FORM A COVALENT BOND.
Claim 2
Dependent Claim
99 words
A THERMOPLASTIC COMPOSITION COMPRISING A HOMOGENEOUS BLEND OF (1) A COPOLYMER PREPARED FROM A MONOMERIC MIXTURE CONSISTING ESSENTIALLY OF A MONOVINYL AROMATIC MONOMER OF THE BENZENE SERIES TOGETHER WITH FROM ABOUT 0.5 TO ABOUT 30 PERCENT BY WEIGHT OF A COMONOMERIC MONOETHYLENICALLY UNSATURATED CARBOXYLIC ACID AND (2) FROM 0.25 TO ABOUT 2.0 PERCENT OF THE WEIGHT OF SAID COPOLYMER OF AN ADDITIVE COMPOUND CONTAINING AT LEAST TWO SUBSTITUENT GROUPS CAPABLE OF HYDROGEN BONDING WITH THE PENDANT CARBOXYL GROUPS OF SAID COPOLYMER AND WHICH CONTAINS NO GROUPS WHICH REACT WITH CARBOXYL GROUPS OF SAID COPOLYMER TO FORM A COVALENT BOND.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |