Patent US2993882A successfully refreshed from Google Patents.
US2993882A
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Process for coupling polyolefins
Assignee: EIDP Inc
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Filing: 1958-07-30
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Granted: 1961-07-25
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Expires: 1978-07-30
Abstract
No abstract record available.
Inventors
- 👤 Ashby Clarence Elmer
- 👤 Foster Samuel Phillip
- 👤 Pieski Edwin Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE PROCESS WHICH COMPRISES COUPLING MOLECULES OF A POLYMER OF THE CLASS CONSISTING OF POLYETHYLENES HAVING A DENSITY OF 0.94 TO 0.97 G./CC. AND ETHYLENE-ALIPHATIC ALPHA-OLEFIN COPOLYMERS CONTAINING FROM 0.1 TO 25 WEIGHT PERCENT OF SAID ALPHA-OLEFIN, AND WHEREIN THE SAID ALPHAOLEFIN HAS FROM 3 TO 18 CARBON ATOMS, SAID POLYMER MOLECULES HAVING A MELT INDEX OF 0.5 TO 20 AND AN ETHYLENIC UNSATURATION OF AT LEAST 1.25 PER 2000 CARBON ATOMS WITH FROM 10 TO 1000 PARTS PER MILLION OF A PEROXIDE AT A TEMPERATURE ABOVE THE MELTING POINT OF THE POLYMER AND THEREBY DECREASING THE METL INDEX FO THE POLYMER AT LEAST ONE HALF TO A POLYMER HAVING A MELT INDEX OF 0.0001 TO 10.
Claim 2
Dependent Claim
117 words
THE PROCESS WHICH COMPRISES COUPLING MOLECULES OF A POLYMER OF THE CLASS CONSISTING OF POLYETHYLENES HAVING A DENSITY OF 0.94 TO 0.97 G./CC. AND ETHYLENE-ALIPHATIC ALPHA-OLEFIN COPOLYMERS CONTAINING FROM 0.1 TO 25 WEIGHT PERCENT OF SAID ALPHA-OLEFIN, AND WHEREIN THE SAID ALPHAOLEFIN HAS FROM 3 TO 18 CARBON ATOMS, SAID POLYMER MOLECULES HAVING A MELT INDEX OF 0.5 TO 20 AND AN ETHYLENIC UNSATURATION OF AT LEAST 1.25 PER 2000 CARBON ATOMS WITH FROM 10 TO 1000 PARTS PER MILLION OF A PEROXIDE AT A TEMPERATURE ABOVE THE MELTING POINT OF THE POLYMER AND THEREBY DECREASING THE METL INDEX FO THE POLYMER AT LEAST ONE HALF TO A POLYMER HAVING A MELT INDEX OF 0.0001 TO 10.
References Cited (Backward Citations)
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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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |