US2989452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irradiated polymers
Assignee: Bar Dal Inc
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Filing: 1958-03-31
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Granted: 1961-06-20
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:03
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/28; C08J2325/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR IMPROVING THE HEAT-RESISTANT PROPERTIES OF A THERMOPLASTIC POLYMERIC ALKENYL ARYL COMPOSITION, COMPRISING IRRADIATING SAID POLYMERIC COMPOSITION WITH AT LEAST 5 MEGAREPS OF IRRADIATION, SAID POLYMERIC COMPOSITION COMPRISING ABOUT 1 TO 75 PERCENT BY WEIGHT, BASED ON THE ALKENYL ARYL POLYMER COMPONENTS OF THE COMPOSITION, OF AN ALKENYL ARYL REPEATING UNIT CONTAINING AN ALIPHATIC GROUP ATTACHED TO THE ARYL NUCLEUS THEREOF IN ADDITION TO SAID ALKENYL GROUP FROM WHICH THE POLYMERIC CHAIN IS FORMED, SAID IRRADIATION BEING HIGH-ENERGY, IONIZING RADIATION, EQUIVALENT TO AT LEAST 100,000 ELECTRON VOLTS AND SAID ALIPHATIC GROUP BEING SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC HYDROCARBON GROUPS AND THE HYDROXY, CARBOXY, CARBOXYLATE, HALO, ALKOXY, ARYLOXY, AND CYCLOALKOXY DERIVATIVES THEREOF, AND THE ARYL NUCLEI OF SAID POLYMERIC COMPOSITION HAVING NO ADDITIONAL SUBSTITUENTS EXCEPT THOSE SELECTED FROM THE CLASS CONSISTING OF HYDROCARBON AND HALOGEN GROUPS.
Claim 2
Dependent Claim
139 words
A PROCESS FOR IMPROVING THE HEAT-RESISTANT PROPERTIES OF A THERMOPLASTIC POLYMERIC ALKENYL ARYL COMPOSITION, COMPRISING IRRADIATING SAID POLYMERIC COMPOSITION WITH AT LEAST 5 MEGAREPS OF IRRADIATION, SAID POLYMERIC COMPOSITION COMPRISING ABOUT 1 TO 75 PERCENT BY WEIGHT, BASED ON THE ALKENYL ARYL POLYMER COMPONENTS OF THE COMPOSITION, OF AN ALKENYL ARYL REPEATING UNIT CONTAINING AN ALIPHATIC GROUP ATTACHED TO THE ARYL NUCLEUS THEREOF IN ADDITION TO SAID ALKENYL GROUP FROM WHICH THE POLYMERIC CHAIN IS FORMED, SAID IRRADIATION BEING HIGH-ENERGY, IONIZING RADIATION, EQUIVALENT TO AT LEAST 100,000 ELECTRON VOLTS AND SAID ALIPHATIC GROUP BEING SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC HYDROCARBON GROUPS AND THE HYDROXY, CARBOXY, CARBOXYLATE, HALO, ALKOXY, ARYLOXY, AND CYCLOALKOXY DERIVATIVES THEREOF, AND THE ARYL NUCLEI OF SAID POLYMERIC COMPOSITION HAVING NO ADDITIONAL SUBSTITUENTS EXCEPT THOSE SELECTED FROM THE CLASS CONSISTING OF HYDROCARBON AND HALOGEN GROUPS.
References Cited (Backward Citations)
GB582559A
Cited
US2836553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |