Patent US2955008A successfully refreshed from Google Patents.
US2955008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of polyacrylonitrile fibrous material
Assignee: GAF Chemicals Corp
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Filing: 1953-07-27
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Granted: 1960-10-04
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Expires: 1973-07-27
Abstract
No abstract record available.
Inventors
- 👤 Henry R Mautner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:15
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/28; Y; Y10; Y10S; Y10S8/00; Y10S8/913; Y10S8/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN AQUEOUS DYE BATH COMPRISING ABOUT 0.005 TO 0.2% BY WEIGHT OF AN ESTER SALT OF A LEUCO VAT DYESTUFF, ABOUT 0.02 TO 0.2% BY WEIGHT OF WATER-SOLUBLE POLYMER OF AN N-VINYL LACTAM SELECTED FROM THE GROUP CONSISTING OF N-VINYL PYRROLIDONE, N-VINYL CAPROLACTAM, NVINYL PIPERIDONE, AND N-VINYL HEXAHYDROPHTHALIMIDINE, AND HAVING A K VALUE OF ABOUT 10 TO 90, AND ABOUT 0.2 TO 1% BY WEIGHT OF SODIUM FORMALDEHYDE SULFOXYLATE.
Claim 2
Dependent Claim
69 words
AN AQUEOUS DYE BATH COMPRISING ABOUT 0.005 TO 0.2% BY WEIGHT OF AN ESTER SALT OF A LEUCO VAT DYESTUFF, ABOUT 0.02 TO 0.2% BY WEIGHT OF WATER-SOLUBLE POLYMER OF AN N-VINYL LACTAM SELECTED FROM THE GROUP CONSISTING OF N-VINYL PYRROLIDONE, N-VINYL CAPROLACTAM, NVINYL PIPERIDONE, AND N-VINYL HEXAHYDROPHTHALIMIDINE, AND HAVING A K VALUE OF ABOUT 10 TO 90, AND ABOUT 0.2 TO 1% BY WEIGHT OF SODIUM FORMALDEHYDE SULFOXYLATE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |