Patent US2979447A successfully refreshed from Google Patents.
US2979447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of graft copolymers
Assignee: Dow Chemical Co
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Filing: 1958-07-18
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Granted: 1961-04-11
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Expires: 1978-07-18
Abstract
No abstract record available.
Inventors
- 👤 Charles A Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:54
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/18; D06M14/26; D06M14/28; C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; D01; D01F; D01F6/00; D01F6/28; D01F6/38; Y; Y10; Y10S; Y10S522/00; Y10S522/911; Y10S522/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
PROCESS FOR IMPROVING THE DYEABILITY OF FIBER-FORMING ACRYLONITRILE POLYMERS THAT CONTAIN IN THE POLYMER MOLECULE AT LEAST ABOUT 80 WEIGHT PERCENT OF ACRYLONITRILE, AN CULE AT LEAST ABOUT 80 WEIGHT PERCENT OF ACRYLONITIRLE, ANY BALANCE BEING ANOTHER ETHYLENICALLY UNSATURATED MONOMER THAT IS COPOLYMERIZABLE WITH ACRYLONITRILE, WHICH PROCESS COMPRISES (1) PREPARING A FIBER-FORMING ACRYLONITRILE POLYMER IN AQUAGEL FORM, (2) INCORPORATING IN SAID AQUAGEL A MINOR PROPORTION OF A MONOETHYLENICALLY UNSATURATED N-VINYL HETEROCYCLIC MONOMERIC COMPOUND SELECTED FROM THE GROUP OF N-VINYL CYCLIC AMIDES AND N-VINYL CYCLIC CARBAMATES WHICH CONSISTS OF THOSE AND MIXTURES THEREOF HAVING THE STRUCTURAL FORMULAE:
Claim 2
Dependent Claim
96 words
PROCESS FOR IMPROVING THE DYEABILITY OF FIBER-FORMING ACRYLONITRILE POLYMERS THAT CONTAIN IN THE POLYMER MOLECULE AT LEAST ABOUT 80 WEIGHT PERCENT OF ACRYLONITRILE, AN CULE AT LEAST ABOUT 80 WEIGHT PERCENT OF ACRYLONITIRLE, ANY BALANCE BEING ANOTHER ETHYLENICALLY UNSATURATED MONOMER THAT IS COPOLYMERIZABLE WITH ACRYLONITRILE, WHICH PROCESS COMPRISES (1) PREPARING A FIBER-FORMING ACRYLONITRILE POLYMER IN AQUAGEL FORM, (2) INCORPORATING IN SAID AQUAGEL A MINOR PROPORTION OF A MONOETHYLENICALLY UNSATURATED N-VINYL HETEROCYCLIC MONOMERIC COMPOUND SELECTED FROM THE GROUP OF N-VINYL CYCLIC AMIDES AND N-VINYL CYCLIC CARBAMATES WHICH CONSISTS OF THOSE AND MIXTURES THEREOF HAVING THE STRUCTURAL FORMULAE:
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |