Patent US3626938A successfully refreshed from Google Patents.
US3071430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of fibrous materials
Assignee: Bleachers Association Ltd
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Filing: 1958-03-03
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Granted: 1963-01-01
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Mccance Henry Bristow
- 👤 Frederick R W Sloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR IMPARTING A DRIP-DRY FINISH TO CELLULOSIC FABRIC WHICH COMPRISES IMPREGNATING THE FABRIC WITH AN AQUEOUS SOLUTION OF (1) POLYVINYL ALCOHOL, (2) A POLYVINYL ALCOHOL-CELLULOSE CROSS-LINKING AGENT CONTAINING AT LEAST TWO HYDROXYL GROUPS AND (3) A WATER SOLUBLE POLYESTER COMPRISING THE POLYCONDENSATION PRODUCT OF A SATURATED POLYHYDRIC ALCOHOL WITH A SUBSTANTIAL EXCESS OF A SATURATED POLYCARBOXYLIC ACID, SAID POLYESTER CONTAINING FREE CARBOXYL GROUPS AND BEING PRESENT IN AN AMOUNT SUFFICIENT TO IMPART A PH OF NOT GREATER THAN 2.4 TO THE SOLUTION, DRYING THE IMPREGNATED FABRIC AND HEATING IT TO REACT THE CROSSLINKING AGENT WITH THE POLYVINYL ALCOHOL AND THE CELLULOSE OF THE FABRIC.
Claim 2
Dependent Claim
106 words
A PROCESS FOR IMPARTING A DRIP-DRY FINISH TO CELLULOSIC FABRIC WHICH COMPRISES IMPREGNATING THE FABRIC WITH AN AQUEOUS SOLUTION OF (1) POLYVINYL ALCOHOL, (2) A POLYVINYL ALCOHOL-CELLULOSE CROSS-LINKING AGENT CONTAINING AT LEAST TWO HYDROXYL GROUPS AND (3) A WATER SOLUBLE POLYESTER COMPRISING THE POLYCONDENSATION PRODUCT OF A SATURATED POLYHYDRIC ALCOHOL WITH A SUBSTANTIAL EXCESS OF A SATURATED POLYCARBOXYLIC ACID, SAID POLYESTER CONTAINING FREE CARBOXYL GROUPS AND BEING PRESENT IN AN AMOUNT SUFFICIENT TO IMPART A PH OF NOT GREATER THAN 2.4 TO THE SOLUTION, DRYING THE IMPREGNATED FABRIC AND HEATING IT TO REACT THE CROSSLINKING AGENT WITH THE POLYVINYL ALCOHOL AND THE CELLULOSE OF THE FABRIC.
References Cited (Backward Citations)
US2295699A
Cited
US2259225A
Cited
US2341735A
Cited
GB568388A
Cited
US2725308A
Cited
US2755198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |