Patent US3746507A successfully refreshed from Google Patents.
US3746507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent dyeing copolyester fibers
Assignee: Celanese Corp
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Filing: 1971-06-29
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Granted: 1973-07-17
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Expires: 1991-06-29
Abstract
Abstract A PROCESS FOR THE PREPARATION OF A DEEP-DYED POLYESTER FIBER WITH GOOD BULK AND HAND IN WHICH A POLYESTER FIBER DERIVED FROM ETHYLENE GLYCOL, DIMETHYL TEREPHTHALATE AND FROM ABOUT 1 TO ABOUT 15 WEIGHT PERCENT OF A DIFUNCTIONAL DYE OPENER HAS APPLIED TO IT A CHLORINATED HYDROCARBON COMPRISED OF FROM ABOUT 0.3 TO ABOUT 10 PERCENT (BY WEIGHT OF CHLORINATED HYDROCARBON) OF DISPERSE DYE AND FROM ABOUT 0.1 TO ABOUT 10 PERCENT (BY VOLUME OF CHLORINATED HYDROCARBON) OF WATER.
Inventors
- 👤 C Browne
- 👤 T Brodof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:10
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; D06P1/92; D06P1/922; D06P1/924; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 0
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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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |