US2996441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiolytic polymerization of cyclopentadiene
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1957-01-29
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Granted: 1961-08-15
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Expires: 1977-01-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Nelson
- 👤 James E Shewmaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:48
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F2/00; C08F2/46; C08F32/00; C08F32/02; C08F32/06; C10; C10M; C10M2203/00; C10M2203/10; C10M2205/00; C10M2205/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A POLYMERIZATION PROCESS WHICH COMPRISES IRRADIATING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENE, ALKYL HOMOLOGUES OF CYCLOPENTADIENE AND MIXTURES THEREOF, IN LIQUID PHASE, IN THE SUBSTANTIAL ABSENCE OF FREE OXYGEN AND AT A TEMPERATURE IN THE RANGE OF -85*C. WITH HIGH ENERGY INOIZING RADIATION EQUIVALENT TO AT LEAST 30 ELECTRON VOLTS UNTIL 0.001 TO 10KWH OF RADIANT ENERGY PER POUND OF POLYMERIC PRODUCT HAVE BEEN ABSORBED AND RECOVERING A POLYMERIC PRODUCT HAVING A MOLECULAR WEIGHT IN THE RANGE OF 500 TO 100,000 STAUDINGER.
Claim 2
Dependent Claim
85 words
A POLYMERIZATION PROCESS WHICH COMPRISES IRRADIATING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENE, ALKYL HOMOLOGUES OF CYCLOPENTADIENE AND MIXTURES THEREOF, IN LIQUID PHASE, IN THE SUBSTANTIAL ABSENCE OF FREE OXYGEN AND AT A TEMPERATURE IN THE RANGE OF -85*C. WITH HIGH ENERGY INOIZING RADIATION EQUIVALENT TO AT LEAST 30 ELECTRON VOLTS UNTIL 0.001 TO 10KWH OF RADIANT ENERGY PER POUND OF POLYMERIC PRODUCT HAVE BEEN ABSORBED AND RECOVERING A POLYMERIC PRODUCT HAVING A MOLECULAR WEIGHT IN THE RANGE OF 500 TO 100,000 STAUDINGER.
References Cited (Backward Citations)
GB665262A
Cited
US2689240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |