Patent US2888369A successfully refreshed from Google Patents.
US2888369A
Expired / Lapsed
US
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Process and composition for improving the properties of fibrous cellulosic material
Assignee: Courtaulds Inc
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Filing: 1956-09-06
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Granted: 1959-05-26
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Expires: 1976-09-06
Abstract
No abstract record available.
Inventors
- 👤 Charles B Ratcliffe
- 👤 Harold F Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:40
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR IMPROVING THE PROPERTIES OF REGENERATED CELLULOSIC FIBROUS MATERIALS WHICH COMPRISES IMPREGNATING REGENERATED CELLULOSE FIBER WITH A HEAT-HARDENABLE RESINOUS MATERIAL AND WITH A WATER-SOLUBLE KETONE HAVING A WATER SOLUBILITY OF NOT LESS THAN ABOUT 4 PARTS BY WEIGHT IN 100 PARTS OF WATER, AND SUBSEQUENTLY CURING SAID RESINOUS MATERIAL.
Claim 2
Dependent Claim
51 words
A PROCESS FOR IMPROVING THE PROPERTIES OF REGENERATED CELLULOSIC FIBROUS MATERIALS WHICH COMPRISES IMPREGNATING REGENERATED CELLULOSE FIBER WITH A HEAT-HARDENABLE RESINOUS MATERIAL AND WITH A WATER-SOLUBLE KETONE HAVING A WATER SOLUBILITY OF NOT LESS THAN ABOUT 4 PARTS BY WEIGHT IN 100 PARTS OF WATER, AND SUBSEQUENTLY CURING SAID RESINOUS MATERIAL.
References Cited (Backward Citations)
US2398307A
Cited
US2738292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |