US3681216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinked nylon by irradiation of a graft copolymer of nylon with an ethylene/acrylate or modified copolymer
Assignee: Custom Resins Inc
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Filing: 1969-06-13
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Granted: 1972-08-01
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Expires: 1989-06-13
Abstract
Abstract THE NYLON ARTICLE SUCH AS FILMS AND FIBERS, ARE EFFECTIVELY CROSS-LINKED BY IRRADIATION TO OBTAIN DIMENSIONAL STABILITY, MEMORY AND RESISTANCE TO HEAT AND SOLVENTS WITHOUT SIGNIFICANT POLYMER DEGRADATION BY EMPOLYING A GRAFT OF A NYLON POLYMER GROWN ON AN ETHYLENE-ACRYLATE COPOLYMER AS INITIATOR AND RESTRICTING THE DOSE OF IONIZING RADIATION TO A LOW DOSE OF ABOUT 5 TO 20 MEGARADS. HIGHER DOSES GIVE A HIGHLY CROSS-LINKED POLYMER WITH SIGNIFICANTLY LOWER DEGRADATION THAN WITH NYLON HOMOPOLYMERS. THE PREFERRED ETHYLENE COPOLYMER HAS A PORTION OF THE ACRYLATE CONVERTED TO AMIDE.
Inventors
- 👤 Francis R Galiano
- 👤 Samuel P Thackaberry
- 👤 Wayne E Smith
- 👤 Raymond P Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:23
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/68; C; C08; C08G; C08G83/00; C08L; C08L77/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |