US2819253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of enhancing the acetate dyeability of vinylidene cyanide interpolymers
Assignee: Goodrich Corp
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Filing: 1955-11-30
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Granted: 1958-01-07
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Expires: 1975-11-30
Abstract
No abstract record available.
Inventors
- 👤 Gateff George
- 👤 Stephen M Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:53
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/22; D06P3/00; D06P3/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE PROCESS FOR ENHANCING THE ACETATE DYEABILITY OF 50 MOL PERCENT VINYLIDENE CYANIDE INTERPOLYMERS WITH OLEFINICALLY UNSATURATED MONONERS WHICH COMPRISES HYDROLYZING SUCH INTERPOLYMERS IN A SOLVENT SOLUTION SELECTED FROM THE GROUP CONSISTING OF (1) DIMETHYLFORMAMIDE AND WATER, AND (2) ACETONE (95%), DIMETHYLFORMAMIDE (4%), AND SULFURIC ACID (1%) USING MERCURIC SULFATE AS AN HYDROLYSIS CATALYST FOR A TIME AND AT A TEMPERATURE SUFFICIENT FOR THE MERCURIC SULFATE TO CATALYZE THE HYDROLYSIS OF A SIGNIFICANT PROPORTION OF THE SIDE CHAIN GROUPS IN THE VINYLIDENE CYANIDE INTERPOLYMER STRUCTURE.
Claim 2
Dependent Claim
85 words
THE PROCESS FOR ENHANCING THE ACETATE DYEABILITY OF 50 MOL PERCENT VINYLIDENE CYANIDE INTERPOLYMERS WITH OLEFINICALLY UNSATURATED MONONERS WHICH COMPRISES HYDROLYZING SUCH INTERPOLYMERS IN A SOLVENT SOLUTION SELECTED FROM THE GROUP CONSISTING OF (1) DIMETHYLFORMAMIDE AND WATER, AND (2) ACETONE (95%), DIMETHYLFORMAMIDE (4%), AND SULFURIC ACID (1%) USING MERCURIC SULFATE AS AN HYDROLYSIS CATALYST FOR A TIME AND AT A TEMPERATURE SUFFICIENT FOR THE MERCURIC SULFATE TO CATALYZE THE HYDROLYSIS OF A SIGNIFICANT PROPORTION OF THE SIDE CHAIN GROUPS IN THE VINYLIDENE CYANIDE INTERPOLYMER STRUCTURE.
References Cited (Backward Citations)
US2579061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |