Patent US3294754A successfully refreshed from Google Patents.
US3294754A
Expired / Lapsed
US
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Ethylene copolymers and process for production thereof
Assignee: BASF SE
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Filing: 1962-09-21
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Granted: 1966-12-27
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Expires: 1982-09-21
Abstract
No abstract record available.
Inventors
- 👤 Naarmann Herbert
- 👤 Schroeder Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:31
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F10/00; C08F22/00; C08F22/36; Y; Y10; Y10S; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
COPOLYMERS CONSISTING ESSENTIALLY OF FROM 99 TO 50% BY WEIGHT OF ETHYLENE COMONOMER AND 1 TO 50% BY WEIGHT OF A POLYMERIZABLE CARBOXYLIC AMIDE COMONOMER SELECTED FROM THE GROUP CONSISTING OF N-METHYLOL DERIVATIVES OF AMIDES OF CARBOXYLIC ACIDS ETHYLENICALLY UNSATURATED IN A,B-POSITION AND HAVING 3 AND 4 CARBON ATOMS, N-METHYLOL MALEIC ACID IMIDE, SAID N-METHYLOL DERIVATIVES CONTAINING NOT MORE THAN ONE COMBINED N-METHYLOL GROUP PER CARBOXYLIC AMIDE GROUP, ALKYL ETHERS OF SAID N-METHYLOL DERIVATIVES CONTAINING FROM 1 TO 6 ATOMS IN THOSE ALKYL GROUPS WHICH ARE ONLY BOUND TO THE OXYGEN ATOMS OF THE ETHERS, AND N-HYDROXYETHYL MALEIC ACID MONOAMIDE SAID COPOLYMERS HAVING A K VALUE OF FROM 15 TO 45 MEASURED IN DECAHYDRONAPHTHALENE AT 130*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |