US3753965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing non-blocking ethylene-acrylic acid copolymer articles and articles produced thereby
Assignee: Union Carbide Corp
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Filing: 1971-10-21
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Granted: 1973-08-21
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Expires: 1991-10-21
Abstract
Abstract ETHYLENE-ACRYLIC ACID COPOLYMERS IN PARTICULATE FORM, SUCH AS, CHIPS, RODS, ETC., ARE SURFACE TREATED WITH A BASE SUCH AS SODIUM HYDROXIDE, AMMONIA OR DIETHYLAMINE TO RENDER THE SHAPED ARTICLES LESS PRONE TO BLOCKING OR STICKING. THE TREATMENT CONVERTS THE CARBOXYL GROUPS ON THE SURFAE TO THE SALT FORM, UP TO ABOUT 2.5 WEIGHT PERCENT OFF THE TOTAL CARBOXYL GROUPS IN THE COPOLYMER ARE CONVERTED AD THE PROPERTIES OF THE ORIGINAL POLYMER ARE NOT ALTERED TO ANY APPRECIABLE EXTENT AS INDICATEDBY MELT INDEX AND SSTIFFNESS MEASUREMENTS.
Inventors
- 👤 G Looney
- 👤 M Hwu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:08
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/08
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |