US2650907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene-copolymer and method of producing the same
Assignee: Sherwin Williams Co
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Filing: 1950-08-18
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Granted: 1953-09-01
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Expires: 1970-08-18
Abstract
No abstract record available.
Inventors
- 👤 James H Sample
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:44
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F242/00; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A FAST DRYING, MINERAL SPIRIT RESISTANT COPOLYMER PRODUCED BY CO-POLYMERIZING A VINYL AROMATIC COMPOUND AND A NON-CONJUGATED UNSATURATED OIL WHICH HAS BEEN PARTIALLY POLYMERIZED BY BLOWING WITH A FREE OXYGEN-CONTAINING GAS AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF DRYING OILS AND SEMI-DRYING OILS AT A TEMPERATURE OF FROM ABOUT 225* F. TO ABOUT 500* F. IN THE PRESENCE OF FROM 0.02% TO ABOUT 1% BY WEIGHT OF THE OIL OF A HEAVY METAL DRIER SOLUBLE IN THE OIL AND FROM 0.5% TO ABOUT 2.0% BY WEIGHT OF THE OIL OF A METAL-FREE PEROXIDE, IN WHICH COPOLYMER THE RATIO OF VINYL AROMATIC COMPOUND TO OIL IS IN THE RANGE OF FROM 60:40 TO 25:75.
Claim 2
Dependent Claim
115 words
A FAST DRYING, MINERAL SPIRIT RESISTANT COPOLYMER PRODUCED BY CO-POLYMERIZING A VINYL AROMATIC COMPOUND AND A NON-CONJUGATED UNSATURATED OIL WHICH HAS BEEN PARTIALLY POLYMERIZED BY BLOWING WITH A FREE OXYGEN-CONTAINING GAS AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF DRYING OILS AND SEMI-DRYING OILS AT A TEMPERATURE OF FROM ABOUT 225* F. TO ABOUT 500* F. IN THE PRESENCE OF FROM 0.02% TO ABOUT 1% BY WEIGHT OF THE OIL OF A HEAVY METAL DRIER SOLUBLE IN THE OIL AND FROM 0.5% TO ABOUT 2.0% BY WEIGHT OF THE OIL OF A METAL-FREE PEROXIDE, IN WHICH COPOLYMER THE RATIO OF VINYL AROMATIC COMPOUND TO OIL IS IN THE RANGE OF FROM 60:40 TO 25:75.
References Cited (Backward Citations)
US2485592A
Cited
US2521675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |