US2504835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin for stabilizing textiles and process of making the same
Assignee: Reichhold Chemicals Inc
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Filing: 1946-08-23
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Granted: 1950-04-18
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Expires: 1966-08-23
Abstract
No abstract record available.
Inventors
- 👤 Hewett Philip Stanley
- 👤 Ralph E Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:21
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
A PROCESS FOR PREPARING A CLEAR, STABLE, WATER WHITE AND WATER SOLUBLE OR DISPERSIBLE RESINOUS CONDENSATION PRODUCT CAPABLE OF DIMENSIONALLY STABILIZING CELLULOSIC TEXTILE MATERIALS, WHICH PROCESS COMPRISES INITIALLY SUBSTANTIALLY COMPLETELY REACTING A SATURATED KETONE SELECTED FROM A GROUP CONSISTING OF ALIPHATIC AND HYDROAROMATIC KETONE WITH FORMALDEHYDE IN AQUEOUS SOLUTION IN THE PROPORTION OF 2-5 MOLS OF FORMALDEHYDE TO 1 MOL OF KETONE IN THE PRESENCE OF A NON-VOLATILE ALKALINE CATALYST AT A TEMPERATURE OF FROM 40*C. TO 65*C. FOR A PERIOD OF TWO TO FIVE HOURS AND MAINTAINING A PH OF 8-10 THROUGHOUT THE INITIAL REACTION STAGE, THEN IMMEDIATELY AND WITHOUT NEUTRALIZATION DEHYDRATING THE REACTION PRODUCT UNDER VACUUM TO FROM ABOUT 60 TO 75% SOLIDS TO FORM A CONDENSED RESINOUS PRODUCT, THE KETONE AND FORMALDEHYDE CONSTITUTING THE SOLE REACTING INGREDIENTS.
References Cited (Backward Citations)
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US2191802A
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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) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |