Patent EP0504066A1 successfully refreshed from Google Patents.
US3012020A
Expired / Lapsed
US
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Cross-linking of polyethylene, polypropylene and copolymers thereof
Assignee: Hercules Powder Co
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Filing: 1957-12-26
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Granted: 1961-12-05
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Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Jr David C Kirk
- 👤 Anderson E Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:55
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08K; C08K5/00; C08K5/16; C08K5/32; C08K5/33; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN THE PROCESS OF VULCANIZATION OF A NORMALLY SOLID MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYETHLYENE, POLYPROPYLENE AND ETHYLENE-PROPYLENE COPOLYMER BY GENERATING FREE-RADICALS IN SITU THEREIN, THE IMPROVEMENT WHICH COMPRISES MIXING WITH SAID MATERIAL PRIOR TO VULCANIZATION ABOUT 0.5 TO ABOUT 20% OF AN ORGANIC PEROXIDE AND ABOUT 0.5 TO ABOUT 20% OF A MODIFIER OF THE GROUP CONSISTING OF QUINONE DIOXIME AND COMPOUNDS OF QUINONE DIOXIME WHEREIN THE H OF AN OXIME GROUP IS REPLACED BY AN ACYL GROUP HAVING 2 TO 12 CARBON ATOMS.
Claim 2
Dependent Claim
87 words
IN THE PROCESS OF VULCANIZATION OF A NORMALLY SOLID MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYETHLYENE, POLYPROPYLENE AND ETHYLENE-PROPYLENE COPOLYMER BY GENERATING FREE-RADICALS IN SITU THEREIN, THE IMPROVEMENT WHICH COMPRISES MIXING WITH SAID MATERIAL PRIOR TO VULCANIZATION ABOUT 0.5 TO ABOUT 20% OF AN ORGANIC PEROXIDE AND ABOUT 0.5 TO ABOUT 20% OF A MODIFIER OF THE GROUP CONSISTING OF QUINONE DIOXIME AND COMPOUNDS OF QUINONE DIOXIME WHEREIN THE H OF AN OXIME GROUP IS REPLACED BY AN ACYL GROUP HAVING 2 TO 12 CARBON ATOMS.
References Cited (Backward Citations)
US2393321A
Cited
US2748104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |