Patent US2917485A successfully refreshed from Google Patents.
US2917485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of high molecular weight polyisobutylene and low molecular weight styrene-isobutylene resinous copolymers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-10-05
•
Granted: 1959-12-15
•
Expires: 1975-10-05
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Newberg
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:32
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF FROM 5 TO 25 PARTS BY WEIGHTS OF A RESINOUS COPOLYMER OF A POLYMERIZABLE UNSATURATED AROMATIC HYDROCARBON SELECTED FROM THE CLASS CONSISTING OF STYRENE AND METHYL AND ETHYL SUBSTITUTED STYRENES AND AN OLEFIN OF FROM 3 TO 5 CARBON ATOMS, SAID COPOLYMER CONTAINING FROM 45 TO 65 WT. PERCENT OF COMBINED POLYMERIZABLE UNSTATURATED AROMATIC COMPOUND, A MOLECULAR WT. BETWEEN 5,000 AND 20,000 AND AN INTRINSIC VIOSCOSITY OF LESS THAN 0.5, WITH FROM 95 TO 75 PARTS BY WEIGHT OF A POLYMER OF AN ISOOLEFIN OF LESS THAN 8 CARBON ATOMS PER MOLECULE AND HAVING A MOLECULAR WEIGHT ABOVE 100.000 BEING DIFFICULTLY PROCESSABLE, AND WHEN EXTRUDED MAKING PRODUCTS HAVING A VERY ROUGH SURFACE AND A HIGH SWELL INDEX, AND SAID MIXED COMPOSITION BEING EASILY PROCESSABLE AND WHEN EXTRUDED MAKING PRODUCTS HAVING A SMOOTH SURFACE AND A SWELL INDEX NOT ABOVE ABOUT 1.3.
Claim 2
Dependent Claim
149 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF FROM 5 TO 25 PARTS BY WEIGHTS OF A RESINOUS COPOLYMER OF A POLYMERIZABLE UNSATURATED AROMATIC HYDROCARBON SELECTED FROM THE CLASS CONSISTING OF STYRENE AND METHYL AND ETHYL SUBSTITUTED STYRENES AND AN OLEFIN OF FROM 3 TO 5 CARBON ATOMS, SAID COPOLYMER CONTAINING FROM 45 TO 65 WT. PERCENT OF COMBINED POLYMERIZABLE UNSTATURATED AROMATIC COMPOUND, A MOLECULAR WT. BETWEEN 5,000 AND 20,000 AND AN INTRINSIC VIOSCOSITY OF LESS THAN 0.5, WITH FROM 95 TO 75 PARTS BY WEIGHT OF A POLYMER OF AN ISOOLEFIN OF LESS THAN 8 CARBON ATOMS PER MOLECULE AND HAVING A MOLECULAR WEIGHT ABOVE 100.000 BEING DIFFICULTLY PROCESSABLE, AND WHEN EXTRUDED MAKING PRODUCTS HAVING A VERY ROUGH SURFACE AND A HIGH SWELL INDEX, AND SAID MIXED COMPOSITION BEING EASILY PROCESSABLE AND WHEN EXTRUDED MAKING PRODUCTS HAVING A SMOOTH SURFACE AND A SWELL INDEX NOT ABOVE ABOUT 1.3.
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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |