Patent US3690942A successfully refreshed from Google Patents.
US3690942A
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US
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Stain release and durable press finishing using solution polymers
Assignee: Celanese Corp
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Filing: 1971-04-23
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Granted: 1972-09-12
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Expires: 1991-04-23
Abstract
Abstract PROCESS FOR IMPARTING DURABLE PRESS AND SOLID RELEASE PROPERTIES TO TEXTILES CONTAINING A SIGNIFICANT MAN-MADE FIBER CONTENT, PARTICULARLY POLYESTERS, BE TREATMENT IN A BATH CONTAINING A DURABLE PRESS TEXTILE RESIN, TEXTILE RESIN CATALYST AND AN ACID SOLUTION POLYMER CHARACTERIZED BY A PH BELOW ABOUT 6.0 AND AN ACID CONTENT OF AT LEAST 20 WEIGHT PERCENT CALCULATED AS ACRYLIC ACID. LOW MOLECULAR WEIGHT, NON-FIBER-FORMING, HYDROPHILIC POLYESTERS SYNERGIZE THE ACTIVITY OF THE ACID SOLUTION POLYMER.
Inventors
- 👤 Joseph K Vandermaas
- 👤 Larry J Rikard
- 👤 Robert K Dunlap
- 👤 James F Lavender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:01
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/37; D06M15/39; D06M15/423; D06M2101/00; D06M2101/16; D06M2101/30; D06M2101/32; D06M2200/00; D06M2200/10; D06M2200/11; D06M2200/20
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |