Patent US3669827A successfully refreshed from Google Patents.
US3669827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent resistant polyethylene containers
Assignee: Honeywell International Inc
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Filing: 1970-05-21
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Granted: 1972-06-13
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Expires: 1990-05-21
Abstract
Abstract A METHOD OF PREPARING HOLLOW POLYETHYLENE CONTAINERS HAVING A NYLON LINER BY ROTATIONAL CASTING WHEREBY THE POLYETHYLENE IS ROTATIONALLY MOLDED; A COPOLYMER OF ETHYLENE AND AN ALKYL ACRYLATE OR METHACRYLATE OR A VINYL ESTER IS ADDED; MOLDING IS CONTINUED TO BOND A LAYER OF THE COPOLYMER TO THE POLYETHYLENE; A CATALYSED AND PROMOTED LACTAM SOLUTION IS ADDED; AND CASTING CONTINUED UNDER ANIONIC POLYMERIZATION CONDITIONS FOR THE LACTAM TO FORM AN INNER NYLON BONDED TO THE COPOLYMER. THE PROCESS FORMS HOLLOW POLYETHYLENE CONTAINERS HAVING A FIRMLY BONDED NYLON LINER WHICH IS RESISTANT TO SOLVENTS.
Inventors
- 👤 John Mcnaughton Kolyer
- 👤 Albert Andrew Kveglis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:37
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/28; B29; B29C; B29C41/00; B29C41/02; B29C41/22; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2077/00
Claims Analysis
Total Claims: 0
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |