US2676950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low unsaturation curable tripolymer resins from a diolefin, an alkene and styrene orhomologue thereof
Assignee: Standard Oil Development Co
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Filing: 1951-11-29
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Granted: 1954-04-27
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Expires: 1971-11-29
Abstract
No abstract record available.
Inventors
- 👤 William J Sparks
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:47
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F210/18; C08F10/00; C08F10/04; C08F10/08; C08F10/10; C08F210/04; C08F210/08; C08F210/10; C08F210/12; C08F236/00; C08F236/02; C08F236/04; C08F236/08; C08F2500/00; C08F2500/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A RESINOUS TRIPOLYMER DERIVED FROM A REACTION MIXTURE CONSISTING ESSENTIALLY OF ABOUT 64% BY WEIGHT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ITS HOMOLOGS HAVING 1 TO 2 METHYL SUBSTITUENTS, ABOUT 3% BY WEIGHT OF A POLYOLEFIN OF 4 TO 10 CARBON ATOMS, AND ABOUT 33% BY WEIGHT OF AN ALKENE HAVING 3 TO 8 CARBON ATOMS, SAID TRIPOLYMER HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 2,000 AND AN IODINE NUMBER OF ABOUT 1 TO 20, AND HAVING BEEN MADE BY COPOLYMERIZATION AT A TEMPERATURE AT LEAST AS LOW AS -10* C. WITH A FRIEDEL-CRAFTS CATALYST.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |