Patent US2921831A successfully refreshed from Google Patents.
US2921831A
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Method of treating synthetic fibers
Assignee: Goodrich Corp
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Filing: 1956-11-13
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Granted: 1960-01-19
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Expires: 1976-11-13
Abstract
No abstract record available.
Inventors
- 👤 Helen G Sommar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:21
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/649; D06P1/6495; D06P3/00; D06P3/70; D06P3/72; D06P3/76; Y; Y10; Y10S; Y10S8/00; Y10S8/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE PROCESS OF DYEING VINYLIDENE CYANIDE INTERPOLYMER TEXTILES WHICH COMPRISES TREATING SAID TEXTILES AT THE EQUIVALENT OF 200-212*F. AND ATOMOSPHERIC PRESSURE WITH A DYE SELECTED FROM THE CLASS CONSISTING OF ACETATE AND BASIC DYES IN THE PRESENCE OF A MEMBER OF THE CLASS CONSISTING OF N,N-DIPHENYLACETAMIDE AND N,N-DIPHENYLFORMAMIDE AS AN ADDITIVE.
Claim 2
Dependent Claim
51 words
THE PROCESS OF DYEING VINYLIDENE CYANIDE INTERPOLYMER TEXTILES WHICH COMPRISES TREATING SAID TEXTILES AT THE EQUIVALENT OF 200-212*F. AND ATOMOSPHERIC PRESSURE WITH A DYE SELECTED FROM THE CLASS CONSISTING OF ACETATE AND BASIC DYES IN THE PRESENCE OF A MEMBER OF THE CLASS CONSISTING OF N,N-DIPHENYLACETAMIDE AND N,N-DIPHENYLFORMAMIDE AS AN ADDITIVE.
References Cited (Backward Citations)
FR502532A
Cited
US2394689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |