US2493584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenated polymer of 2-vinyldibenzofuran
Assignee: GEN FLECTRIC Co
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Filing: 1945-09-27
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Granted: 1950-01-03
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Expires: 1965-09-27
Abstract
No abstract record available.
Inventors
- 👤 Edward A Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:53
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE METHOD OF INCREASING THE HEAT-DISTORTION POINT OF A THERMOPLASTIC POLYMER OF 2-VINYLDIBENZOFURAN WHICH COMPRISES DISSOLVING SAID POLYMER IN DIOXANE AND HYDROGENATING SAID POLYMER IN THE PRESENCE OF A HYDROGENATION CATALYST AT A PRESSURE OF ABOUT 1800 POUNDS PER SQUARE INCH AT A TEMPERATURE OF ABOUT 340*C. UNTIL THE POLYMER HAS COMBINED WITH ABOUT 2.3 PER CENT BY WEIGHT OF HYDROGEN BASED ON THE WEIGHT OF THE SAID POLYMER.
Claim 2
Independent Claim
69 words
THE METHOD OF INCREASING THE HEAT-DISTORTION POINT OF A THERMOPLASTIC POLYMER OF 2-VINYLDIBENZOFURAN WHICH COMPRISES DISSOLVING SAID POLYMER IN DIOXANE AND HYDROGENATING SAID POLYMER IN THE PRESENCE OF A HYDROGENATION CATALYST AT A PRESSURE OF ABOUT 1800 POUNDS PER SQUARE INCH AT A TEMPERATURE OF ABOUT 340*C. UNTIL THE POLYMER HAS COMBINED WITH ABOUT 2.3 PER CENT BY WEIGHT OF HYDROGEN BASED ON THE WEIGHT OF THE SAID POLYMER.
References Cited (Backward Citations)
US2266675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |