US2497458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butadiene-styrene copolymer tackified with isoolefin-diolefin-styrene copolymer
Assignee: Sunoco Inc
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Filing: 1945-05-26
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Granted: 1950-02-14
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Expires: 1965-05-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Stewart S Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:32
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF A PREPONDERANT PROPORTION OF A SYNTHETIC RUBBER, MADE BY POLYMERIZATION OF A MIXTURE CONSISTING ESSENTIALLY OF BUTADIENE AND STYRENE, AND A MINOR PROPORTION, EFFECTIVE TO IMPART TACK THERETO, OF A TACKY, ELASTIC TACKIFIER COPOLYMER PRODUCT DERIVED BY POLYMERIZATION, AT A TEMPERATURE OF FROM ABOUT -40*C. TO ABOUT -160*C. WITH THE AID OF A FRIEDEL-CRAFTS TYPE CATALYST, OF A MONOMERIC MIXTURE COMPRISING FROM ABOUT 50 TO ABOUT 70 PARTS BY WEIGHT OF AN ISO-MONO-OLEFIN OF 4-6 CARBON ATOMS HAVING A DOUBLE BOND IN THE ALPHA POSITION AND A SIDE CHAIN IN THE BETA POSITION, FROM ABOUT 10 TO ABOUT 30 PARTS BY WEIGHT OF AN ALIPHATIC 1,3 CONJUGATED DIOLEFIN AND FROM ABOUT 20 TO ABOUT 30 PARTS BY WEIGHT OF STYRENE.
Claim 2
Dependent Claim
128 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF A PREPONDERANT PROPORTION OF A SYNTHETIC RUBBER, MADE BY POLYMERIZATION OF A MIXTURE CONSISTING ESSENTIALLY OF BUTADIENE AND STYRENE, AND A MINOR PROPORTION, EFFECTIVE TO IMPART TACK THERETO, OF A TACKY, ELASTIC TACKIFIER COPOLYMER PRODUCT DERIVED BY POLYMERIZATION, AT A TEMPERATURE OF FROM ABOUT -40*C. TO ABOUT -160*C. WITH THE AID OF A FRIEDEL-CRAFTS TYPE CATALYST, OF A MONOMERIC MIXTURE COMPRISING FROM ABOUT 50 TO ABOUT 70 PARTS BY WEIGHT OF AN ISO-MONO-OLEFIN OF 4-6 CARBON ATOMS HAVING A DOUBLE BOND IN THE ALPHA POSITION AND A SIDE CHAIN IN THE BETA POSITION, FROM ABOUT 10 TO ABOUT 30 PARTS BY WEIGHT OF AN ALIPHATIC 1,3 CONJUGATED DIOLEFIN AND FROM ABOUT 20 TO ABOUT 30 PARTS BY WEIGHT OF STYRENE.
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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |