Patent US2977245A successfully refreshed from Google Patents.
US2977245A
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Surfaces of decreased water wettability and process for the preparation thereof
Assignee: Wyeth Holdings LLC
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Filing: 1957-06-24
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Granted: 1961-03-28
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Expires: 1977-06-24
Abstract
No abstract record available.
Inventors
- 👤 Jen Yun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:35
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/325; D06M13/332; D06M13/402; D06M13/41; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31786
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS OF TREATING A HYDROPHILIC SURFACE TO DECREASE ITS WETTABILITY BY WATER, WHICH COMPRISES CONTACTING SAID SURFACE WITH A DILUTE AQUEOUS SOLUTION OF A HIGH MOLECULAR WEIGHT CATIONIC POLYAMINE HAVING AN AVERAGE MOLECULAR WEIGHT IN EXCESS OF 10,000 AND CONTAINING AT MOLECULAR WEIGHT IN EXCESS OF 10,000 AND CONTAINING AT PLACEABLE HYDROGEN ATOM FOR EVERY 10 CARBON ATOMS THEREIN, THEREBY IRREVERSIBLY ADSORBING AT LEAST SOME OF SAID POLYAMINE ON SAID SURFACE, AND THEN CONTACTING SAID SURFACE WITH SUFFICIENT OF A DILUTE AQUEOUS SOLUTION OF A SOAP HAVING A HYDROPHOBIC ANION TO CONVERT SAID ADSORBED POLYAMINE TO HYDROPHOBIC SOAP FORM.
Claim 2
Dependent Claim
100 words
A PROCESS OF TREATING A HYDROPHILIC SURFACE TO DECREASE ITS WETTABILITY BY WATER, WHICH COMPRISES CONTACTING SAID SURFACE WITH A DILUTE AQUEOUS SOLUTION OF A HIGH MOLECULAR WEIGHT CATIONIC POLYAMINE HAVING AN AVERAGE MOLECULAR WEIGHT IN EXCESS OF 10,000 AND CONTAINING AT MOLECULAR WEIGHT IN EXCESS OF 10,000 AND CONTAINING AT PLACEABLE HYDROGEN ATOM FOR EVERY 10 CARBON ATOMS THEREIN, THEREBY IRREVERSIBLY ADSORBING AT LEAST SOME OF SAID POLYAMINE ON SAID SURFACE, AND THEN CONTACTING SAID SURFACE WITH SUFFICIENT OF A DILUTE AQUEOUS SOLUTION OF A SOAP HAVING A HYDROPHOBIC ANION TO CONVERT SAID ADSORBED POLYAMINE TO HYDROPHOBIC SOAP FORM.
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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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |