Patent US3228918A successfully refreshed from Google Patents.
US3228918A
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Process for improving the stiffness of a film of ethylene/1, 3-butadiene copolymer and the resulting product
Assignee: EIDP Inc
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Filing: 1961-01-04
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Granted: 1966-01-11
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Expires: 1981-01-04
Abstract
No abstract record available.
Inventors
- 👤 Tocker Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:04
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
PROCESS FOR IMPROVING THE STIFFNESS AND TENACITY CHARACTERISTICS OF A FILM OF AN ESSENTIALLY LINEAR ETHYLENE/1,3-ALKADIENE COPOLYMER PREPARED IN THE PRESENCE OF A ZIEGLER CATALYST AT A TEMPERATURE UNDER ABOUT 10*C., WHEREIN SAID COPOLYMER CONTAINS FROM 0.5 TO 10 MOLE PERCENT 1,3-ALKADIENE, WHICH COMPRISES IRRADIATING SAID FILM WITH ULTRAVIOLET LIGHT IN AN OXYGEN-CONTAINING ATMOSPHERE TO PRODUCE CARBONYL GROUPS IN SAID FILM IN AN AMOUNT TO PROVIDE A CARBONYL INTENSITY AS MEASURED BY INFRARED ABSORPTOIN OF FORM 1 TO 9.
Claim 2
Dependent Claim
79 words
PROCESS FOR IMPROVING THE STIFFNESS AND TENACITY CHARACTERISTICS OF A FILM OF AN ESSENTIALLY LINEAR ETHYLENE/1,3-ALKADIENE COPOLYMER PREPARED IN THE PRESENCE OF A ZIEGLER CATALYST AT A TEMPERATURE UNDER ABOUT 10*C., WHEREIN SAID COPOLYMER CONTAINS FROM 0.5 TO 10 MOLE PERCENT 1,3-ALKADIENE, WHICH COMPRISES IRRADIATING SAID FILM WITH ULTRAVIOLET LIGHT IN AN OXYGEN-CONTAINING ATMOSPHERE TO PRODUCE CARBONYL GROUPS IN SAID FILM IN AN AMOUNT TO PROVIDE A CARBONYL INTENSITY AS MEASURED BY INFRARED ABSORPTOIN OF FORM 1 TO 9.
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |