Patent US3228902A successfully refreshed from Google Patents.
US3228902A
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Process for forming polymeric dispersions of aromatic amides with negative solubility
Assignee: EIDP Inc
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Filing: 1963-01-29
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Granted: 1966-01-11
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Expires: 1983-01-29
Abstract
No abstract record available.
Inventors
- 👤 Beste Lawrence Forwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:10
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; C08J3/09; C08J2377/00; C08J2377/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
METHOD FOR THE PRODUCT OF POLYMERIC DISPERSIONS WHICH COMPRISES THE STEPS OF: (A) PROVIDING A POLYMER SOLUTION FORMED OF A SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYLFORMAMIDE, DIMETHYLACETAMIDE, N-METHYL-2-PRYROLIDONE, (-METHYLSUCCINIMIDE, N-METHYLGLUTARIMIDE, AND DIMETHYLSULFOXIDE TOGETHER WITH 0.5 TO 10% BY WEIGHT OF A FIBER-FORMING LINEAR POLYAMIDE CONSISTING OF RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
53 words
METHOD FOR THE PRODUCT OF POLYMERIC DISPERSIONS WHICH COMPRISES THE STEPS OF: (A) PROVIDING A POLYMER SOLUTION FORMED OF A SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYLFORMAMIDE, DIMETHYLACETAMIDE, N-METHYL-2-PRYROLIDONE, (-METHYLSUCCINIMIDE, N-METHYLGLUTARIMIDE, AND DIMETHYLSULFOXIDE TOGETHER WITH 0.5 TO 10% BY WEIGHT OF A FIBER-FORMING LINEAR POLYAMIDE CONSISTING OF RECURRING UNITS OF THE FORMULA
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |