Patent US2923698A successfully refreshed from Google Patents.
US2923698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water repellent, method of preparing same and textile coated therewith
Assignee: Individual
•
Filing: 1952-11-04
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Granted: 1960-02-02
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Expires: 1972-11-04
Abstract
No abstract record available.
Inventors
- 👤 John B Rust
- 👤 William B Canfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:57
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2197
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
THE METHOD OF MAKING WATER DISPERSIBLE WATER-REPELLENTS WHICH COMPRISES HEATING ALL IN AMOUNT FOR STOICHIOMETRIC REACTION A FATTY ACID AMIDE OF AT LEAST NINE CARBON ATOMS, WITH A SUBSTANCE YIELDING FORMALDEHYDE UNDER REACTION CONDITIONS, HEATING THE RESULTING PRODUCT WITH A SECONDARY AMINE TO FORM A TERTIARY AMINE, AND HEATING THE LATTER WITH A SALT FORMING ACID COMPOUND CAPABLE OF CONVERTING THE TERTIARY AMINE INTO A WATER-DISPERSIBLE NON-QUATERNARY TERTIARY AMINE SALT, THE HEATING BEING CARRIED OUT AT ANY TEMPERATURE UP TO AND INCLUDING THOSE PRODUCING REFLUXING, THE FINAL PRODUCT BEING SUBSTANTIALLY COMPLETELY DISPERSIBLE IN WATER AND IN 10% WATER SOLUTION GIVING A PH OF FROM ABOUT 3.0 TO 6.0 IN WHICH THE FATTY ACID AMIDE IS HEATED WITH A UREA HAVING A PLURALITY OF NITROGEN ATOMS WITH ALDEHYDE REACTIVE NHYDROGEN THEREON.
Claim 2
Independent Claim
130 words
THE METHOD OF MAKING WATER DISPERSIBLE WATER-REPELLENTS WHICH COMPRISES HEATING ALL IN AMOUNT FOR STOICHIOMETRIC REACTION A FATTY ACID AMIDE OF AT LEAST NINE CARBON ATOMS, WITH A SUBSTANCE YIELDING FORMALDEHYDE UNDER REACTION CONDITIONS, HEATING THE RESULTING PRODUCT WITH A SECONDARY AMINE TO FORM A TERTIARY AMINE, AND HEATING THE LATTER WITH A SALT FORMING ACID COMPOUND CAPABLE OF CONVERTING THE TERTIARY AMINE INTO A WATER-DISPERSIBLE NON-QUATERNARY TERTIARY AMINE SALT, THE HEATING BEING CARRIED OUT AT ANY TEMPERATURE UP TO AND INCLUDING THOSE PRODUCING REFLUXING, THE FINAL PRODUCT BEING SUBSTANTIALLY COMPLETELY DISPERSIBLE IN WATER AND IN 10% WATER SOLUTION GIVING A PH OF FROM ABOUT 3.0 TO 6.0 IN WHICH THE FATTY ACID AMIDE IS HEATED WITH A UREA HAVING A PLURALITY OF NITROGEN ATOMS WITH ALDEHYDE REACTIVE NHYDROGEN THEREON.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |